99774909 has 40 divisors (see below), whose sum is σ = 168993440. Its totient is φ = 58156704.

The previous prime is 99774901. The next prime is 99774919. The reversal of 99774909 is 90947799.

It is not a de Polignac number, because 99774909 - 2³ = 99774901 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99774901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17514 + ... + 22500.

It is an arithmetic number, because the mean of its divisors is an integer number (4224836).

Almost surely, 2^99774909 is an apocalyptic number.

It is an amenable number.

99774909 is a deficient number, since it is larger than the sum of its proper divisors (69218531).

99774909 is a wasteful number, since it uses less digits than its factorization.

99774909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031 (or 5022 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 99774909 is about 9988.7391096174. The cubic root of 99774909 is about 463.8103617760.

The spelling of 99774909 in words is "ninety-nine million, seven hundred seventy-four thousand, nine hundred nine".