99979472 has 40 divisors (see below), whose sum is σ = 205091040. Its totient is φ = 47134080.

The previous prime is 99979471. The next prime is 99979493. The reversal of 99979472 is 27497999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99979471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17447 + ... + 22457.

It is an arithmetic number, because the mean of its divisors is an integer number (5127276).

Almost surely, 2^99979472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99979472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102545520).

99979472 is an abundant number, since it is smaller than the sum of its proper divisors (105111568).

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

99979472 is a wasteful number, since it uses less digits than its factorization.

99979472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091 (or 5085 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 56.

The square root of 99979472 is about 9998.9735473197. The cubic root of 99979472 is about 464.1271203425.

The spelling of 99979472 in words is "ninety-nine million, nine hundred seventy-nine thousand, four hundred seventy-two".