87373591 has 4 divisors (see below), whose sum is σ = 92513232. Its totient is φ = 82233952.

The previous prime is 87373579. The next prime is 87373639. The reversal of 87373591 is 19537378.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87373591 - 2¹⁵ = 87340823 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 (87373541) 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, 2569795 + ... + 2569828.

It is an arithmetic number, because the mean of its divisors is an integer number (23128308).

Almost surely, 2^87373591 is an apocalyptic number.

87373591 is a deficient number, since it is larger than the sum of its proper divisors (5139641).

87373591 is a wasteful number, since it uses less digits than its factorization.

87373591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5139640.

The product of its digits is 158760, while the sum is 43.

The square root of 87373591 is about 9347.3841795446. The cubic root of 87373591 is about 443.7381091570.

The spelling of 87373591 in words is "eighty-seven million, three hundred seventy-three thousand, five hundred ninety-one".