99912732 has 12 divisors (see below), whose sum is σ = 233129736. Its totient is φ = 33304240.

The previous prime is 99912731. The next prime is 99912733. The reversal of 99912732 is 23721999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99912731) and next prime (99912733).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99912731) 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 3 ways as a sum of consecutive naturals, for example, 4163019 + ... + 4163042.

It is an arithmetic number, because the mean of its divisors is an integer number (19427478).

Almost surely, 2^99912732 is an apocalyptic number.

It is an amenable number.

99912732 is an abundant number, since it is smaller than the sum of its proper divisors (133217004).

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

99912732 is a wasteful number, since it uses less digits than its factorization.

99912732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326068 (or 8326066 counting only the distinct ones).

The product of its digits is 61236, while the sum is 42.

The square root of 99912732 is about 9995.6356476214. The cubic root of 99912732 is about 464.0238233408.

It can be divided in two parts, 999 and 12732, that added together give a palindrome (13731).

The spelling of 99912732 in words is "ninety-nine million, nine hundred twelve thousand, seven hundred thirty-two".