91924442 has 8 divisors (see below), whose sum is σ = 138765396. Its totient is φ = 45669312.

The previous prime is 91924439. The next prime is 91924487. The reversal of 91924442 is 24442919.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91795561 + 128881 = 9581^2 + 359^2 .

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

It is a super-2 number, since 2×91924442² = 16900206074022728, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 146063 + ... + 146690.

Almost surely, 2^91924442 is an apocalyptic number.

91924442 is a deficient number, since it is larger than the sum of its proper divisors (46840954).

91924442 is a wasteful number, since it uses less digits than its factorization.

91924442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292912.

The product of its digits is 20736, while the sum is 35.

The square root of 91924442 is about 9587.7235045656. The cubic root of 91924442 is about 451.3121242574.

The spelling of 91924442 in words is "ninety-one million, nine hundred twenty-four thousand, four hundred forty-two".