890057881 has 2 divisors, whose sum is σ = 890057882. Its totient is φ = 890057880.

The previous prime is 890057863. The next prime is 890057891. The reversal of 890057881 is 188750098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 629558281 + 260499600 = 25091^2 + 16140^2 .

It is a cyclic number.

It is not a de Polignac number, because 890057881 - 2⁵ = 890057849 is a prime.

It is a super-2 number, since 2×890057881² = 1584406063060420322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (890057891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445028940 + 445028941.

It is an arithmetic number, because the mean of its divisors is an integer number (445028941).

Almost surely, 2^890057881 is an apocalyptic number.

It is an amenable number.

890057881 is a deficient number, since it is larger than the sum of its proper divisors (1).

890057881 is an equidigital number, since it uses as much as digits as its factorization.

890057881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 890057881 is about 29833.8378523448. The cubic root of 890057881 is about 961.9210234942.

The spelling of 890057881 in words is "eight hundred ninety million, fifty-seven thousand, eight hundred eighty-one".