87138124637 has 8 divisors (see below), whose sum is σ = 87773464800. Its totient is φ = 86502905424.

The previous prime is 87138124583. The next prime is 87138124649. The reversal of 87138124637 is 73642183178.

It is a happy number.

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 87138124637 - 2¹⁶ = 87138059101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87138624637) 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, 1830623 + ... + 1877619.

It is an arithmetic number, because the mean of its divisors is an integer number (10971683100).

Almost surely, 2^87138124637 is an apocalyptic number.

It is an amenable number.

87138124637 is a deficient number, since it is larger than the sum of its proper divisors (635340163).

87138124637 is a wasteful number, since it uses less digits than its factorization.

87138124637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60475.

The product of its digits is 1354752, while the sum is 50.

The spelling of 87138124637 in words is "eighty-seven billion, one hundred thirty-eight million, one hundred twenty-four thousand, six hundred thirty-seven".