99274809 has 4 divisors (see below), whose sum is σ = 132366416. Its totient is φ = 66183204.

The previous prime is 99274793. The next prime is 99274837. The reversal of 99274809 is 90847299.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 99274809 - 2⁴ = 99274793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99274309) 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, 16545799 + ... + 16545804.

It is an arithmetic number, because the mean of its divisors is an integer number (33091604).

Almost surely, 2^99274809 is an apocalyptic number.

It is an amenable number.

99274809 is a deficient number, since it is larger than the sum of its proper divisors (33091607).

99274809 is a wasteful number, since it uses less digits than its factorization.

99274809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33091606.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 99274809 is about 9963.6744728037. The cubic root of 99274809 is about 463.0341473197.

The spelling of 99274809 in words is "ninety-nine million, two hundred seventy-four thousand, eight hundred nine".