99964165 has 24 divisors (see below), whose sum is σ = 147756312. Its totient is φ = 64512000.

The previous prime is 99964153. The next prime is 99964169. The reversal of 99964165 is 56146999.

It can be written as a sum of positive squares in 4 ways, for example, as 11716929 + 88247236 = 3423^2 + 9394^2 .

It is not a de Polignac number, because 99964165 - 2¹⁹ = 99439877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99964169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7836 + ... + 16165.

It is an arithmetic number, because the mean of its divisors is an integer number (6156513).

Almost surely, 2^99964165 is an apocalyptic number.

It is an amenable number.

99964165 is a deficient number, since it is larger than the sum of its proper divisors (47792147).

99964165 is a wasteful number, since it uses less digits than its factorization.

99964165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24037 (or 24030 counting only the distinct ones).

The product of its digits is 524880, while the sum is 49.

The square root of 99964165 is about 9998.2080894528. The cubic root of 99964165 is about 464.1034329586.

It can be divided in two parts, 9996 and 4165, that added together give a square (14161 = 119²).

The spelling of 99964165 in words is "ninety-nine million, nine hundred sixty-four thousand, one hundred sixty-five".