99999492 has 48 divisors (see below), whose sum is σ = 249443712. Its totient is φ = 31102720.

The previous prime is 99999481. The next prime is 99999509. The reversal of 99999492 is 29499999.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6898 + ... + 15734.

It is an arithmetic number, because the mean of its divisors is an integer number (5196744).

Almost surely, 2^99999492 is an apocalyptic number.

99999492 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124721856).

99999492 is an abundant number, since it is smaller than the sum of its proper divisors (149444220).

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

99999492 is a wasteful number, since it uses less digits than its factorization.

99999492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8908 (or 8906 counting only the distinct ones).

The product of its digits is 4251528, while the sum is 60.

The square root of 99999492 is about 9999.9745999677. The cubic root of 99999492 is about 464.1580973842.

It can be divided in two parts, 9999 and 9492, that added together give a palindrome (19491).

The spelling of 99999492 in words is "ninety-nine million, nine hundred ninety-nine thousand, four hundred ninety-two".