87591907 has 4 divisors (see below), whose sum is σ = 94329760. Its totient is φ = 80854056.

The previous prime is 87591899. The next prime is 87591937. The reversal of 87591907 is 70919578.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70919578 = 2 ⋅35459789.

It is a cyclic number.

It is not a de Polignac number, because 87591907 - 2³ = 87591899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87591937) 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, 3368907 + ... + 3368932.

It is an arithmetic number, because the mean of its divisors is an integer number (23582440).

Almost surely, 2^87591907 is an apocalyptic number.

87591907 is a deficient number, since it is larger than the sum of its proper divisors (6737853).

87591907 is a wasteful number, since it uses less digits than its factorization.

87591907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6737852.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 87591907 is about 9359.0548133879. The cubic root of 87591907 is about 444.1073838012.

The spelling of 87591907 in words is "eighty-seven million, five hundred ninety-one thousand, nine hundred seven".