86870913 has 8 divisors (see below), whose sum is σ = 115927488. Its totient is φ = 57864144.

The previous prime is 86870909. The next prime is 86870933. The reversal of 86870913 is 31907868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86870913 - 2² = 86870909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86870933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8170 + ... + 15507.

It is an arithmetic number, because the mean of its divisors is an integer number (14490936).

Almost surely, 2^86870913 is an apocalyptic number.

It is an amenable number.

86870913 is a deficient number, since it is larger than the sum of its proper divisors (29056575).

86870913 is a wasteful number, since it uses less digits than its factorization.

86870913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24903.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 86870913 is about 9320.4566948192. The cubic root of 86870913 is about 442.8855001860.

The spelling of 86870913 in words is "eighty-six million, eight hundred seventy thousand, nine hundred thirteen".