99764909 has 4 divisors (see below), whose sum is σ = 100016604. Its totient is φ = 99513216.

The previous prime is 99764893. The next prime is 99764923. The reversal of 99764909 is 90946799.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44262409 + 55502500 = 6653^2 + 7450^2 .

It is a cyclic number.

It is not a de Polignac number, because 99764909 - 2⁴ = 99764893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99764969) 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, 125252 + ... + 126045.

It is an arithmetic number, because the mean of its divisors is an integer number (25004151).

Almost surely, 2^99764909 is an apocalyptic number.

It is an amenable number.

99764909 is a deficient number, since it is larger than the sum of its proper divisors (251695).

99764909 is a wasteful number, since it uses less digits than its factorization.

99764909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251694.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The square root of 99764909 is about 9988.2385333952. The cubic root of 99764909 is about 463.7948660346.

The spelling of 99764909 in words is "ninety-nine million, seven hundred sixty-four thousand, nine hundred nine".