99999372 has 48 divisors (see below), whose sum is σ = 269523072. Its totient is φ = 28519680.

The previous prime is 99999353. The next prime is 99999373. The reversal of 99999372 is 27399999.

It is not an unprimeable number, because it can be changed into a prime (99999373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20038 + ... + 24525.

It is an arithmetic number, because the mean of its divisors is an integer number (5615064).

Almost surely, 2^99999372 is an apocalyptic number.

It is an amenable number.

99999372 is an abundant number, since it is smaller than the sum of its proper divisors (169523700).

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

99999372 is a wasteful number, since it uses less digits than its factorization.

99999372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44598 (or 44596 counting only the distinct ones).

The product of its digits is 2480058, while the sum is 57.

The square root of 99999372 is about 9999.9685999507. The cubic root of 99999372 is about 464.1579117200.

The spelling of 99999372 in words is "ninety-nine million, nine hundred ninety-nine thousand, three hundred seventy-two".