87888138913 has 4 divisors (see below), whose sum is σ = 91709362368. Its totient is φ = 84066915460.

The previous prime is 87888138853. The next prime is 87888138917. The reversal of 87888138913 is 31983188878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87888138913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87888138917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910611693 + ... + 1910611738.

It is an arithmetic number, because the mean of its divisors is an integer number (22927340592).

Almost surely, 2^87888138913 is an apocalyptic number.

It is an amenable number.

87888138913 is a deficient number, since it is larger than the sum of its proper divisors (3821223455).

87888138913 is a wasteful number, since it uses less digits than its factorization.

87888138913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821223454.

The product of its digits is 18579456, while the sum is 64.

It can be divided in two parts, 87888 and 138913, that added together give a triangular number (226801 = T₆₇₃).

The spelling of 87888138913 in words is "eighty-seven billion, eight hundred eighty-eight million, one hundred thirty-eight thousand, nine hundred thirteen".