87590813213 has 2 divisors, whose sum is σ = 87590813214. Its totient is φ = 87590813212.

The previous prime is 87590813207. The next prime is 87590813227. The reversal of 87590813213 is 31231809578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87164886169 + 425927044 = 295237^2 + 20638^2 .

It is a cyclic number.

It is not a de Polignac number, because 87590813213 - 2²² = 87586618909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87590813273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43795406606 + 43795406607.

It is an arithmetic number, because the mean of its divisors is an integer number (43795406607).

Almost surely, 2^87590813213 is an apocalyptic number.

It is an amenable number.

87590813213 is a deficient number, since it is larger than the sum of its proper divisors (1).

87590813213 is an equidigital number, since it uses as much as digits as its factorization.

87590813213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 87590813213 in words is "eighty-seven billion, five hundred ninety million, eight hundred thirteen thousand, two hundred thirteen".