91722974 has 16 divisors (see below), whose sum is σ = 157365600. Its totient is φ = 39278304.

The previous prime is 91722971. The next prime is 91722977. The reversal of 91722974 is 47922719.

It is an interprime number because it is at equal distance from previous prime (91722971) and next prime (91722977).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91722971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26792 + ... + 30020.

It is an arithmetic number, because the mean of its divisors is an integer number (9835350).

Almost surely, 2^91722974 is an apocalyptic number.

91722974 is a deficient number, since it is larger than the sum of its proper divisors (65642626).

91722974 is a wasteful number, since it uses less digits than its factorization.

91722974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267.

The product of its digits is 63504, while the sum is 41.

The square root of 91722974 is about 9577.2111807144. The cubic root of 91722974 is about 450.9821740799.

The spelling of 91722974 in words is "ninety-one million, seven hundred twenty-two thousand, nine hundred seventy-four".