99921374 has 16 divisors (see below), whose sum is σ = 171580416. Its totient is φ = 42751800.

The previous prime is 99921373. The next prime is 99921383. The reversal of 99921374 is 47312999.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99921373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3179 + ... + 14489.

It is an arithmetic number, because the mean of its divisors is an integer number (10723776).

Almost surely, 2^99921374 is an apocalyptic number.

99921374 is a deficient number, since it is larger than the sum of its proper divisors (71659042).

99921374 is a wasteful number, since it uses less digits than its factorization.

99921374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11951.

The product of its digits is 122472, while the sum is 44.

The square root of 99921374 is about 9996.0679269401. The cubic root of 99921374 is about 464.0372016100.

The spelling of 99921374 in words is "ninety-nine million, nine hundred twenty-one thousand, three hundred seventy-four".