87899204513 has 2 divisors, whose sum is σ = 87899204514. Its totient is φ = 87899204512.

The previous prime is 87899204467. The next prime is 87899204539. The reversal of 87899204513 is 31540299878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83858313889 + 4040890624 = 289583^2 + 63568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87899204513 is a prime.

It is not a weakly prime, because it can be changed into another prime (87899204543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43949602256 + 43949602257.

It is an arithmetic number, because the mean of its divisors is an integer number (43949602257).

Almost surely, 2^87899204513 is an apocalyptic number.

It is an amenable number.

87899204513 is a deficient number, since it is larger than the sum of its proper divisors (1).

87899204513 is an equidigital number, since it uses as much as digits as its factorization.

87899204513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 87899204513 in words is "eighty-seven billion, eight hundred ninety-nine million, two hundred four thousand, five hundred thirteen".