86900981 has 2 divisors, whose sum is σ = 86900982. Its totient is φ = 86900980.

The previous prime is 86900977. The next prime is 86900987. The reversal of 86900981 is 18900968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77598481 + 9302500 = 8809^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 86900981 - 2² = 86900977 is a prime.

It is a super-2 number, since 2×86900981² = 15103560997524722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86900987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43450490 + 43450491.

It is an arithmetic number, because the mean of its divisors is an integer number (43450491).

Almost surely, 2^86900981 is an apocalyptic number.

It is an amenable number.

86900981 is a deficient number, since it is larger than the sum of its proper divisors (1).

86900981 is an equidigital number, since it uses as much as digits as its factorization.

86900981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 86900981 is about 9322.0695663570. The cubic root of 86900981 is about 442.9365918754.

The spelling of 86900981 in words is "eighty-six million, nine hundred thousand, nine hundred eighty-one".