890501881 has 2 divisors, whose sum is σ = 890501882. Its totient is φ = 890501880.

The previous prime is 890501849. The next prime is 890501897. The reversal of 890501881 is 188105098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830361856 + 60140025 = 28816^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 890501881 - 2⁵ = 890501849 is a prime.

It is a super-2 number, since 2×890501881² = 1585987200129076322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (890501831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445250940 + 445250941.

It is an arithmetic number, because the mean of its divisors is an integer number (445250941).

Almost surely, 2^890501881 is an apocalyptic number.

It is an amenable number.

890501881 is a deficient number, since it is larger than the sum of its proper divisors (1).

890501881 is an equidigital number, since it uses as much as digits as its factorization.

890501881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 40.

The square root of 890501881 is about 29841.2781395167. The cubic root of 890501881 is about 962.0809464032.

The spelling of 890501881 in words is "eight hundred ninety million, five hundred one thousand, eight hundred eighty-one".