30491096689 has 3 divisors (see below), whose sum is σ = 30491271307. Its totient is φ = 30490922072.

The previous prime is 30491096687. The next prime is 30491096693. The reversal of 30491096689 is 98669019403.

The square root of 30491096689 is 174617.

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: 98669019403 = 491 ⋅200955233.

It can be written as a sum of positive squares in only one way, i.e., 12693402225 + 17797694464 = 112665^2 + 133408^2 .

It is not a de Polignac number, because 30491096689 - 2¹ = 30491096687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30491096687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 87309 + ... + 261925.

Almost surely, 2^30491096689 is an apocalyptic number.

30491096689 is the 174617-th square number.

30491096689 is the 87309-th centered octagonal number.

It is an amenable number.

30491096689 is a deficient number, since it is larger than the sum of its proper divisors (174618).

30491096689 is an frugal number, since it uses more digits than its factorization.

30491096689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349234 (or 174617 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 30491096689 in words is "thirty billion, four hundred ninety-one million, ninety-six thousand, six hundred eighty-nine".