86557013 has 4 divisors (see below), whose sum is σ = 91648620. Its totient is φ = 81465408.

The previous prime is 86557001. The next prime is 86557021. The reversal of 86557013 is 31075568.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75916369 + 10640644 = 8713^2 + 3262^2 .

It is a cyclic number.

It is not a de Polignac number, because 86557013 - 2⁴ = 86556997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86557063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2545778 + ... + 2545811.

It is an arithmetic number, because the mean of its divisors is an integer number (22912155).

Almost surely, 2^86557013 is an apocalyptic number.

It is an amenable number.

86557013 is a deficient number, since it is larger than the sum of its proper divisors (5091607).

86557013 is a wasteful number, since it uses less digits than its factorization.

86557013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091606.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 86557013 is about 9303.6021518549. The cubic root of 86557013 is about 442.3514144640.

The spelling of 86557013 in words is "eighty-six million, five hundred fifty-seven thousand, thirteen".