969123621 has 4 divisors (see below), whose sum is σ = 1292164832. Its totient is φ = 646082412.

The previous prime is 969123619. The next prime is 969123629. The reversal of 969123621 is 126321969.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 969123621 - 2¹ = 969123619 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 969123621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969123629) 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, 161520601 + ... + 161520606.

It is an arithmetic number, because the mean of its divisors is an integer number (323041208).

Almost surely, 2^969123621 is an apocalyptic number.

It is an amenable number.

969123621 is a deficient number, since it is larger than the sum of its proper divisors (323041211).

969123621 is a wasteful number, since it uses less digits than its factorization.

969123621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323041210.

The product of its digits is 34992, while the sum is 39.

The square root of 969123621 is about 31130.7504085591. The cubic root of 969123621 is about 989.6000904938.

The spelling of 969123621 in words is "nine hundred sixty-nine million, one hundred twenty-three thousand, six hundred twenty-one".