91756642 has 8 divisors (see below), whose sum is σ = 137720016. Its totient is φ = 45849972.

The previous prime is 91756589. The next prime is 91756649. The reversal of 91756642 is 24665719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×91756642² = 16838562702232328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91756595 and 91756604.

It is not an unprimeable number, because it can be changed into a prime (91756649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9868 + ... + 16759.

It is an arithmetic number, because the mean of its divisors is an integer number (17215002).

Almost surely, 2^91756642 is an apocalyptic number.

91756642 is a deficient number, since it is larger than the sum of its proper divisors (45963374).

91756642 is a wasteful number, since it uses less digits than its factorization.

91756642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28352.

The product of its digits is 90720, while the sum is 40.

The square root of 91756642 is about 9578.9687336372. The cubic root of 91756642 is about 451.0373467728.

The spelling of 91756642 in words is "ninety-one million, seven hundred fifty-six thousand, six hundred forty-two".