91973842 has 8 divisors (see below), whose sum is σ = 146076156. Its totient is φ = 43281792.

The previous prime is 91973837. The next prime is 91973857. The reversal of 91973842 is 24837919.

It can be written as a sum of positive squares in 2 ways, for example, as 87441201 + 4532641 = 9351^2 + 2129^2 .

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

It is a super-2 number, since 2×91973842² = 16918375224481928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352523 + ... + 1352590.

Almost surely, 2^91973842 is an apocalyptic number.

91973842 is a deficient number, since it is larger than the sum of its proper divisors (54102314).

91973842 is a wasteful number, since it uses less digits than its factorization.

91973842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705132.

The product of its digits is 108864, while the sum is 43.

The square root of 91973842 is about 9590.2993696756. The cubic root of 91973842 is about 451.3929545056.

The spelling of 91973842 in words is "ninety-one million, nine hundred seventy-three thousand, eight hundred forty-two".