91961738 has 32 divisors (see below), whose sum is σ = 160636608. Its totient is φ = 39020800.

The previous prime is 91961719. The next prime is 91961743. The reversal of 91961738 is 83716919.

It is a super-3 number, since 3×91961738³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48056 + ... + 49932.

It is an arithmetic number, because the mean of its divisors is an integer number (5019894).

Almost surely, 2^91961738 is an apocalyptic number.

91961738 is a deficient number, since it is larger than the sum of its proper divisors (68674870).

91961738 is a wasteful number, since it uses less digits than its factorization.

91961738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038.

The product of its digits is 81648, while the sum is 44.

The square root of 91961738 is about 9589.6682945762. The cubic root of 91961738 is about 451.3731521361.

The spelling of 91961738 in words is "ninety-one million, nine hundred sixty-one thousand, seven hundred thirty-eight".