968421621 has 16 divisors (see below), whose sum is σ = 1406059200. Its totient is φ = 590542848.

The previous prime is 968421613. The next prime is 968421637. The reversal of 968421621 is 126124869.

It is not a de Polignac number, because 968421621 - 2³ = 968421613 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 968421621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (968421521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291276 + ... + 294581.

It is an arithmetic number, because the mean of its divisors is an integer number (87878700).

Almost surely, 2^968421621 is an apocalyptic number.

It is an amenable number.

968421621 is a deficient number, since it is larger than the sum of its proper divisors (437637579).

968421621 is a wasteful number, since it uses less digits than its factorization.

968421621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585908.

The product of its digits is 41472, while the sum is 39.

The square root of 968421621 is about 31119.4733406592. The cubic root of 968421621 is about 989.3610886249.

The spelling of 968421621 in words is "nine hundred sixty-eight million, four hundred twenty-one thousand, six hundred twenty-one".