86985911 has 2 divisors, whose sum is σ = 86985912. Its totient is φ = 86985910.

The previous prime is 86985901. The next prime is 86985917. The reversal of 86985911 is 11958968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86985911 - 2¹⁴ = 86969527 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86985917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43492955 + 43492956.

It is an arithmetic number, because the mean of its divisors is an integer number (43492956).

Almost surely, 2^86985911 is an apocalyptic number.

86985911 is a deficient number, since it is larger than the sum of its proper divisors (1).

86985911 is an equidigital number, since it uses as much as digits as its factorization.

86985911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 47.

The square root of 86985911 is about 9326.6237728344. The cubic root of 86985911 is about 443.0808417095.

The spelling of 86985911 in words is "eighty-six million, nine hundred eighty-five thousand, nine hundred eleven".