87655137 has 4 divisors (see below), whose sum is σ = 116873520. Its totient is φ = 58436756.

The previous prime is 87655123. The next prime is 87655153. The reversal of 87655137 is 73155678.

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 not a de Polignac number, because 87655137 - 2¹⁴ = 87638753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87655157) 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, 14609187 + ... + 14609192.

It is an arithmetic number, because the mean of its divisors is an integer number (29218380).

Almost surely, 2^87655137 is an apocalyptic number.

It is an amenable number.

87655137 is a deficient number, since it is larger than the sum of its proper divisors (29218383).

87655137 is a wasteful number, since it uses less digits than its factorization.

87655137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29218382.

The product of its digits is 176400, while the sum is 42.

The square root of 87655137 is about 9362.4322160430. The cubic root of 87655137 is about 444.2142207477.

The spelling of 87655137 in words is "eighty-seven million, six hundred fifty-five thousand, one hundred thirty-seven".