91873384 has 16 divisors (see below), whose sum is σ = 175183200. Its totient is φ = 45157872.

The previous prime is 91873357. The next prime is 91873387. The reversal of 91873384 is 48337819.

It is a happy number.

It is a super-2 number, since 2×91873384² = 16881437375222912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91873384.

It is not an unprimeable number, because it can be changed into a prime (91873387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96852 + ... + 97795.

It is an arithmetic number, because the mean of its divisors is an integer number (10948950).

Almost surely, 2^91873384 is an apocalyptic number.

It is an amenable number.

91873384 is a deficient number, since it is larger than the sum of its proper divisors (83309816).

91873384 is a wasteful number, since it uses less digits than its factorization.

91873384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194712 (or 194708 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 91873384 is about 9585.0604588599. The cubic root of 91873384 is about 451.2285506848.

The spelling of 91873384 in words is "ninety-one million, eight hundred seventy-three thousand, three hundred eighty-four".