91647485 has 16 divisors (see below), whose sum is σ = 112031856. Its totient is φ = 71958528.

The previous prime is 91647461. The next prime is 91647497. The reversal of 91647485 is 58474619.

It can be written as a sum of positive squares in 8 ways, for example, as 25664356 + 65983129 = 5066^2 + 8123^2 .

It is a cyclic number.

It is not a de Polignac number, because 91647485 - 2⁶ = 91647421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93317 + ... + 94293.

It is an arithmetic number, because the mean of its divisors is an integer number (7001991).

Almost surely, 2^91647485 is an apocalyptic number.

It is an amenable number.

91647485 is a deficient number, since it is larger than the sum of its proper divisors (20384371).

91647485 is a wasteful number, since it uses less digits than its factorization.

91647485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312.

The product of its digits is 241920, while the sum is 44.

The square root of 91647485 is about 9573.2692952826. The cubic root of 91647485 is about 450.8584190535.

The spelling of 91647485 in words is "ninety-one million, six hundred forty-seven thousand, four hundred eighty-five".