87913067881 has 2 divisors, whose sum is σ = 87913067882. Its totient is φ = 87913067880.

The previous prime is 87913067843. The next prime is 87913067903. The reversal of 87913067881 is 18876031978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82128096400 + 5784971481 = 286580^2 + 76059^2 .

It is a cyclic number.

It is not a de Polignac number, because 87913067881 - 2¹⁷ = 87912936809 is a prime.

It is a super-2 number, since 2×87913067881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87913067681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43956533940 + 43956533941.

It is an arithmetic number, because the mean of its divisors is an integer number (43956533941).

Almost surely, 2^87913067881 is an apocalyptic number.

It is an amenable number.

87913067881 is a deficient number, since it is larger than the sum of its proper divisors (1).

87913067881 is an equidigital number, since it uses as much as digits as its factorization.

87913067881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 87913067881 in words is "eighty-seven billion, nine hundred thirteen million, sixty-seven thousand, eight hundred eighty-one".