86810897 has 2 divisors, whose sum is σ = 86810898. Its totient is φ = 86810896.

The previous prime is 86810887. The next prime is 86810903. The reversal of 86810897 is 79801868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64899136 + 21911761 = 8056^2 + 4681^2 .

It is a cyclic number.

It is not a de Polignac number, because 86810897 - 2⁸ = 86810641 is a prime.

It is a super-2 number, since 2×86810897² = 15072263675889218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86810887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43405448 + 43405449.

It is an arithmetic number, because the mean of its divisors is an integer number (43405449).

Almost surely, 2^86810897 is an apocalyptic number.

It is an amenable number.

86810897 is a deficient number, since it is larger than the sum of its proper divisors (1).

86810897 is an equidigital number, since it uses as much as digits as its factorization.

86810897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 86810897 is about 9317.2365538286. The cubic root of 86810897 is about 442.7834854506.

The spelling of 86810897 in words is "eighty-six million, eight hundred ten thousand, eight hundred ninety-seven".