890364021 has 4 divisors (see below), whose sum is σ = 1187152032. Its totient is φ = 593576012.

The previous prime is 890364011. The next prime is 890364023. The reversal of 890364021 is 120463098.

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 a cyclic number.

It is not a de Polignac number, because 890364021 - 2²² = 886169717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890364023) 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, 148394001 + ... + 148394006.

It is an arithmetic number, because the mean of its divisors is an integer number (296788008).

Almost surely, 2^890364021 is an apocalyptic number.

It is an amenable number.

890364021 is a deficient number, since it is larger than the sum of its proper divisors (296788011).

890364021 is a wasteful number, since it uses less digits than its factorization.

890364021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296788010.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 890364021 is about 29838.9681624549. The cubic root of 890364021 is about 962.0312967517.

The spelling of 890364021 in words is "eight hundred ninety million, three hundred sixty-four thousand, twenty-one".