890690931 has 16 divisors (see below), whose sum is σ = 1421045920. Its totient is φ = 548117280.

The previous prime is 890690923. The next prime is 890690981. The reversal of 890690931 is 139096098.

It is not a de Polignac number, because 890690931 - 2³ = 890690923 is a prime.

It is a super-2 number, since 2×890690931² = 1586660669131293522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890690921) 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, 1268440 + ... + 1269141.

It is an arithmetic number, because the mean of its divisors is an integer number (88815370).

Almost surely, 2^890690931 is an apocalyptic number.

890690931 is a deficient number, since it is larger than the sum of its proper divisors (530354989).

890690931 is a wasteful number, since it uses less digits than its factorization.

890690931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537603 (or 2537597 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 890690931 is about 29844.4455636221. The cubic root of 890690931 is about 962.1490235693.

The spelling of 890690931 in words is "eight hundred ninety million, six hundred ninety thousand, nine hundred thirty-one".