87016691 has 4 divisors (see below), whose sum is σ = 87062472. Its totient is φ = 86970912.

The previous prime is 87016687. The next prime is 87016697. The reversal of 87016691 is 19661078.

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 87016691 - 2² = 87016687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87016697) 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, 19910 + ... + 23883.

It is an arithmetic number, because the mean of its divisors is an integer number (21765618).

Almost surely, 2^87016691 is an apocalyptic number.

87016691 is a deficient number, since it is larger than the sum of its proper divisors (45781).

87016691 is a wasteful number, since it uses less digits than its factorization.

87016691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45780.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 87016691 is about 9328.2737416952. The cubic root of 87016691 is about 443.1330969919.

The spelling of 87016691 in words is "eighty-seven million, sixteen thousand, six hundred ninety-one".