91457661 has 16 divisors (see below), whose sum is σ = 123258816. Its totient is φ = 60318336.

The previous prime is 91457647. The next prime is 91457669. The reversal of 91457661 is 16675419.

It is a de Polignac number, because none of the positive numbers 2^k-91457661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91457669) 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, 162166 + ... + 162728.

It is an arithmetic number, because the mean of its divisors is an integer number (7703676).

Almost surely, 2^91457661 is an apocalyptic number.

It is an amenable number.

91457661 is a deficient number, since it is larger than the sum of its proper divisors (31801155).

91457661 is a wasteful number, since it uses less digits than its factorization.

91457661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052.

The product of its digits is 45360, while the sum is 39.

The square root of 91457661 is about 9563.3498838012. The cubic root of 91457661 is about 450.5469251273.

The spelling of 91457661 in words is "ninety-one million, four hundred fifty-seven thousand, six hundred sixty-one".