99412921 has 8 divisors (see below), whose sum is σ = 104781600. Its totient is φ = 94057920.

The previous prime is 99412909. The next prime is 99412927. The reversal of 99412921 is 12921499.

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

It is a cyclic number.

It is not a de Polignac number, because 99412921 - 2⁹ = 99412409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99412927) 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, 13770 + ... + 19708.

It is an arithmetic number, because the mean of its divisors is an integer number (13097700).

Almost surely, 2^99412921 is an apocalyptic number.

It is an amenable number.

99412921 is a deficient number, since it is larger than the sum of its proper divisors (5368679).

99412921 is a wasteful number, since it uses less digits than its factorization.

99412921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6839.

The product of its digits is 11664, while the sum is 37.

The square root of 99412921 is about 9970.6028403502. The cubic root of 99412921 is about 463.2487735661.

The spelling of 99412921 in words is "ninety-nine million, four hundred twelve thousand, nine hundred twenty-one".