87160391 has 4 divisors (see below), whose sum is σ = 91747800. Its totient is φ = 82572984.

The previous prime is 87160387. The next prime is 87160421. The reversal of 87160391 is 19306178.

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 87160391 - 2² = 87160387 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 (87160691) 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, 2293676 + ... + 2293713.

It is an arithmetic number, because the mean of its divisors is an integer number (22936950).

Almost surely, 2^87160391 is an apocalyptic number.

87160391 is a deficient number, since it is larger than the sum of its proper divisors (4587409).

87160391 is a wasteful number, since it uses less digits than its factorization.

87160391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587408.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 87160391 is about 9335.9729541168. The cubic root of 87160391 is about 443.3768939176.

The spelling of 87160391 in words is "eighty-seven million, one hundred sixty thousand, three hundred ninety-one".