99121935 has 32 divisors (see below), whose sum is σ = 174021120. Its totient is φ = 47779200.

The previous prime is 99121931. The next prime is 99121937. The reversal of 99121935 is 53912199.

It is a Cunningham number, because it is equal to 9956²-1.

It is not a de Polignac number, because 99121935 - 2² = 99121931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99121893 and 99121902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99121931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28206 + ... + 31524.

It is an arithmetic number, because the mean of its divisors is an integer number (5438160).

Almost surely, 2^99121935 is an apocalyptic number.

99121935 is a deficient number, since it is larger than the sum of its proper divisors (74899185).

99121935 is a wasteful number, since it uses less digits than its factorization.

99121935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519.

The product of its digits is 21870, while the sum is 39.

The square root of 99121935 is about 9955.9999497790. Note that the first 4 decimals coincide. The cubic root of 99121935 is about 462.7963486655.

The spelling of 99121935 in words is "ninety-nine million, one hundred twenty-one thousand, nine hundred thirty-five".