87091065 has 32 divisors (see below), whose sum is σ = 155376000. Its totient is φ = 46284480.

The previous prime is 87091061. The next prime is 87091097. The reversal of 87091065 is 56019078.

It is not a de Polignac number, because 87091065 - 2² = 87091061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87091061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43711 + ... + 45659.

It is an arithmetic number, because the mean of its divisors is an integer number (4855500).

Almost surely, 2^87091065 is an apocalyptic number.

It is an amenable number.

87091065 is a deficient number, since it is larger than the sum of its proper divisors (68284935).

87091065 is a wasteful number, since it uses less digits than its factorization.

87091065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294 (or 2288 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 87091065 is about 9332.2593727350. The cubic root of 87091065 is about 443.2593110753.

The spelling of 87091065 in words is "eighty-seven million, ninety-one thousand, sixty-five".