87138883817 has 8 divisors (see below), whose sum is σ = 91728319200. Its totient is φ = 82549766304.

The previous prime is 87138883771. The next prime is 87138883837. The reversal of 87138883817 is 71838883178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87138883817 - 2¹² = 87138879721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87138883817.

It is not an unprimeable number, because it can be changed into a prime (87138883837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659534 + ... + 780552.

It is an arithmetic number, because the mean of its divisors is an integer number (11466039900).

Almost surely, 2^87138883817 is an apocalyptic number.

It is an amenable number.

87138883817 is a deficient number, since it is larger than the sum of its proper divisors (4589435383).

87138883817 is a wasteful number, since it uses less digits than its factorization.

87138883817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158935.

The product of its digits is 14450688, while the sum is 62.

The spelling of 87138883817 in words is "eighty-seven billion, one hundred thirty-eight million, eight hundred eighty-three thousand, eight hundred seventeen".