87858713 has 2 divisors, whose sum is σ = 87858714. Its totient is φ = 87858712.

The previous prime is 87858697. The next prime is 87858733. The reversal of 87858713 is 31785878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68029504 + 19829209 = 8248^2 + 4453^2 .

It is a cyclic number.

It is not a de Polignac number, because 87858713 - 2⁴ = 87858697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87858733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43929356 + 43929357.

It is an arithmetic number, because the mean of its divisors is an integer number (43929357).

Almost surely, 2^87858713 is an apocalyptic number.

It is an amenable number.

87858713 is a deficient number, since it is larger than the sum of its proper divisors (1).

87858713 is an equidigital number, since it uses as much as digits as its factorization.

87858713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 47.

The square root of 87858713 is about 9373.2978721472. The cubic root of 87858713 is about 444.5578455468.

The spelling of 87858713 in words is "eighty-seven million, eight hundred fifty-eight thousand, seven hundred thirteen".