91873420 has 24 divisors (see below), whose sum is σ = 195580224. Its totient is φ = 36245376.

The previous prime is 91873399. The next prime is 91873459. The reversal of 91873420 is 2437819.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30004 + ... + 32923.

It is an arithmetic number, because the mean of its divisors is an integer number (8149176).

Almost surely, 2^91873420 is an apocalyptic number.

It is an amenable number.

91873420 is an abundant number, since it is smaller than the sum of its proper divisors (103706804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91873420 is a wasteful number, since it uses less digits than its factorization.

91873420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63009 (or 63007 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 91873420 is about 9585.0623367822. The cubic root of 91873420 is about 451.2286096218.

The spelling of 91873420 in words is "ninety-one million, eight hundred seventy-three thousand, four hundred twenty".