86885857 has 2 divisors, whose sum is σ = 86885858. Its totient is φ = 86885856.

The previous prime is 86885837. The next prime is 86885891. The reversal of 86885857 is 75858868.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64899136 + 21986721 = 8056^2 + 4689^2 .

It is a cyclic number.

It is not a de Polignac number, because 86885857 - 2²³ = 78497249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86885798 and 86885807.

It is not a weakly prime, because it can be changed into another prime (86885807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43442928 + 43442929.

It is an arithmetic number, because the mean of its divisors is an integer number (43442929).

Almost surely, 2^86885857 is an apocalyptic number.

It is an amenable number.

86885857 is a deficient number, since it is larger than the sum of its proper divisors (1).

86885857 is an equidigital number, since it uses as much as digits as its factorization.

86885857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4300800, while the sum is 55.

The square root of 86885857 is about 9321.2583377997. The cubic root of 86885857 is about 442.9108945757.

The spelling of 86885857 in words is "eighty-six million, eight hundred eighty-five thousand, eight hundred fifty-seven".