99412491 has 4 divisors (see below), whose sum is σ = 132549992. Its totient is φ = 66274992.

The previous prime is 99412457. The next prime is 99412499. The reversal of 99412491 is 19421499.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99412491 - 2¹³ = 99404299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99412499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16568746 + ... + 16568751.

It is an arithmetic number, because the mean of its divisors is an integer number (33137498).

Almost surely, 2^99412491 is an apocalyptic number.

99412491 is a deficient number, since it is larger than the sum of its proper divisors (33137501).

99412491 is a wasteful number, since it uses less digits than its factorization.

99412491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33137500.

The product of its digits is 23328, while the sum is 39.

The square root of 99412491 is about 9970.5812769367. The cubic root of 99412491 is about 463.2481056541.

The spelling of 99412491 in words is "ninety-nine million, four hundred twelve thousand, four hundred ninety-one".