91742661 has 12 divisors (see below), whose sum is σ = 132658240. Its totient is φ = 61096680.

The previous prime is 91742633. The next prime is 91742663. The reversal of 91742661 is 16624719.

It is not a de Polignac number, because 91742661 - 2⁷ = 91742533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91742663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4446 + ... + 14256.

Almost surely, 2^91742661 is an apocalyptic number.

It is an amenable number.

91742661 is a deficient number, since it is larger than the sum of its proper divisors (40915579).

91742661 is a wasteful number, since it uses less digits than its factorization.

91742661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10856 (or 10853 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 91742661 is about 9578.2389299913. The cubic root of 91742661 is about 451.0144373561.

The spelling of 91742661 in words is "ninety-one million, seven hundred forty-two thousand, six hundred sixty-one".