91919604 has 48 divisors (see below), whose sum is σ = 245605248. Its totient is φ = 26210688.

The previous prime is 91919603. The next prime is 91919623. The reversal of 91919604 is 40691919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91919603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66262 + ... + 67634.

It is an arithmetic number, because the mean of its divisors is an integer number (5116776).

Almost surely, 2^91919604 is an apocalyptic number.

It is an amenable number.

91919604 is an abundant number, since it is smaller than the sum of its proper divisors (153685644).

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

91919604 is a wasteful number, since it uses less digits than its factorization.

91919604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 91919604 is about 9587.4711994352. The cubic root of 91919604 is about 451.3042065723.

The spelling of 91919604 in words is "ninety-one million, nine hundred nineteen thousand, six hundred four".