86990951 has 2 divisors, whose sum is σ = 86990952. Its totient is φ = 86990950.

The previous prime is 86990947. The next prime is 86990963. The reversal of 86990951 is 15909968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86990951 - 2² = 86990947 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 86990896 and 86990905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86990051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43495475 + 43495476.

It is an arithmetic number, because the mean of its divisors is an integer number (43495476).

Almost surely, 2^86990951 is an apocalyptic number.

86990951 is a deficient number, since it is larger than the sum of its proper divisors (1).

86990951 is an equidigital number, since it uses as much as digits as its factorization.

86990951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 86990951 is about 9326.8939631584. The cubic root of 86990951 is about 443.0893989739.

The spelling of 86990951 in words is "eighty-six million, nine hundred ninety thousand, nine hundred fifty-one".