91129922 has 8 divisors (see below), whose sum is σ = 147209916. Its totient is φ = 42059952.

The previous prime is 91129903. The next prime is 91129939. The reversal of 91129922 is 22992119.

It can be written as a sum of positive squares in 2 ways, for example, as 88755241 + 2374681 = 9421^2 + 1541^2 .

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

It is an unprimeable number.

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, 1752473 + ... + 1752524.

Almost surely, 2^91129922 is an apocalyptic number.

91129922 is a deficient number, since it is larger than the sum of its proper divisors (56079994).

91129922 is a wasteful number, since it uses less digits than its factorization.

91129922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505012.

The product of its digits is 5832, while the sum is 35.

The square root of 91129922 is about 9546.1993484318. The cubic root of 91129922 is about 450.0081019117.

The spelling of 91129922 in words is "ninety-one million, one hundred twenty-nine thousand, nine hundred twenty-two".