30873652681 has 3 divisors (see below), whose sum is σ = 30873828391. Its totient is φ = 30873476972.

The previous prime is 30873652637. The next prime is 30873652717. The reversal of 30873652681 is 18625637803.

The square root of 30873652681 is 175709.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18625637803 = 503 ⋅37029101.

It can be written as a sum of positive squares in only one way, i.e., 9621844281 + 21251808400 = 98091^2 + 145780^2 .

It is not a de Polignac number, because 30873652681 - 2³³ = 22283718089 is a prime.

It is a super-2 number, since 2×30873652681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30873652181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 87855 + ... + 263563.

Almost surely, 2^30873652681 is an apocalyptic number.

30873652681 is the 175709-th square number.

30873652681 is the 87855-th centered octagonal number.

It is an amenable number.

30873652681 is a deficient number, since it is larger than the sum of its proper divisors (175710).

30873652681 is an frugal number, since it uses more digits than its factorization.

30873652681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351418 (or 175709 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

Multiplying 30873652681 by its sum of digits (49), we get a square (1512808981369 = 1229963²).

The spelling of 30873652681 in words is "thirty billion, eight hundred seventy-three million, six hundred fifty-two thousand, six hundred eighty-one".