426979912969 has 9 divisors (see below), whose sum is σ = 435223442773. Its totient is φ = 418889709472.

The previous prime is 426979912937. The next prime is 426979912987. The reversal of 426979912969 is 969219979624.

The square root of 426979912969 is 653437.

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

It can be written as a sum of positive squares in 4 ways, for example, as 104823775225 + 322156137744 = 323765^2 + 567588^2 .

It is not a de Polignac number, because 426979912969 - 2⁵ = 426979912937 is a prime.

It is a super-2 number, since 2×426979912969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426979910969) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 34625997 + ... + 34638325.

Almost surely, 2^426979912969 is an apocalyptic number.

426979912969 is the 653437-th square number.

426979912969 is the 326719-th centered octagonal number.

It is an amenable number.

426979912969 is a deficient number, since it is larger than the sum of its proper divisors (8243529804).

426979912969 is an frugal number, since it uses more digits than its factorization.

426979912969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24764 (or 12382 counting only the distinct ones).

The product of its digits is 238085568, while the sum is 73.

The spelling of 426979912969 in words is "four hundred twenty-six billion, nine hundred seventy-nine million, nine hundred twelve thousand, nine hundred sixty-nine".