30142862689 has 3 divisors (see below), whose sum is σ = 30143036307. Its totient is φ = 30142689072.

The previous prime is 30142862663. The next prime is 30142862777. The reversal of 30142862689 is 98626824103.

The square root of 30142862689 is 173617.

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.

It can be written as a sum of positive squares in only one way, i.e., 17462301025 + 12680561664 = 132145^2 + 112608^2 .

It is not a de Polignac number, because 30142862689 - 2¹⁷ = 30142731617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30142862089) 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, 86809 + ... + 260425.

It is an arithmetic number, because the mean of its divisors is an integer number (10047678769).

Almost surely, 2^30142862689 is an apocalyptic number.

30142862689 is the 173617-th square number.

30142862689 is the 86809-th centered octagonal number.

It is an amenable number.

30142862689 is a deficient number, since it is larger than the sum of its proper divisors (173618).

30142862689 is an frugal number, since it uses more digits than its factorization.

30142862689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347234 (or 173617 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

Multiplying 30142862689 by its sum of digits (49), we get a square (1477000271761 = 1215319²).

The spelling of 30142862689 in words is "thirty billion, one hundred forty-two million, eight hundred sixty-two thousand, six hundred eighty-nine".