890331657 has 4 divisors (see below), whose sum is σ = 1187108880. Its totient is φ = 593554436.

The previous prime is 890331613. The next prime is 890331671. The reversal of 890331657 is 756133098.

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 890331657 - 2⁶ = 890331593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (890331257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148388607 + ... + 148388612.

It is an arithmetic number, because the mean of its divisors is an integer number (296777220).

Almost surely, 2^890331657 is an apocalyptic number.

It is an amenable number.

890331657 is a deficient number, since it is larger than the sum of its proper divisors (296777223).

890331657 is a wasteful number, since it uses less digits than its factorization.

890331657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296777222.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 890331657 is about 29838.4258465489. The cubic root of 890331657 is about 962.0196402616.

The spelling of 890331657 in words is "eight hundred ninety million, three hundred thirty-one thousand, six hundred fifty-seven".