87061091 has 16 divisors (see below), whose sum is σ = 96327168. Its totient is φ = 78192000.

The previous prime is 87061087. The next prime is 87061099. The reversal of 87061091 is 19016078.

It is a cyclic number.

It is not a de Polignac number, because 87061091 - 2² = 87061087 is a prime.

It is a super-2 number, since 2×87061091² = 15159267132220562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87061099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79550 + ... + 80636.

It is an arithmetic number, because the mean of its divisors is an integer number (6020448).

Almost surely, 2^87061091 is an apocalyptic number.

87061091 is a deficient number, since it is larger than the sum of its proper divisors (9266077).

87061091 is a wasteful number, since it uses less digits than its factorization.

87061091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 87061091 is about 9330.6532997427. The cubic root of 87061091 is about 443.2084532783.

The spelling of 87061091 in words is "eighty-seven million, sixty-one thousand, ninety-one".