969998641 has 4 divisors (see below), whose sum is σ = 1003446900. Its totient is φ = 936550384.

The previous prime is 969998639. The next prime is 969998651. The reversal of 969998641 is 146899969.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 621056241 + 348942400 = 24921^2 + 18680^2 .

It is a cyclic number.

It is not a de Polignac number, because 969998641 - 2¹ = 969998639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 969998641.

It is not an unprimeable number, because it can be changed into a prime (969998611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16724086 + ... + 16724143.

It is an arithmetic number, because the mean of its divisors is an integer number (250861725).

Almost surely, 2^969998641 is an apocalyptic number.

It is an amenable number.

969998641 is a deficient number, since it is larger than the sum of its proper divisors (33448259).

969998641 is a wasteful number, since it uses less digits than its factorization.

969998641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33448258.

The product of its digits is 7558272, while the sum is 61.

The square root of 969998641 is about 31144.8011873571. The cubic root of 969998641 is about 989.8978369562.

The spelling of 969998641 in words is "nine hundred sixty-nine million, nine hundred ninety-eight thousand, six hundred forty-one".