99904749893 has 16 divisors (see below), whose sum is σ = 109713438576. Its totient is φ = 90402424320.

The previous prime is 99904749821. The next prime is 99904749899. The reversal of 99904749893 is 39894740999.

It can be written as a sum of positive squares in 8 ways, for example, as 3219200644 + 96685549249 = 56738^2 + 310943^2 .

It is not a de Polignac number, because 99904749893 - 2¹⁶ = 99904684357 is a prime.

It is a super-2 number, since 2×99904749893² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99904749899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752321 + ... + 875097.

It is an arithmetic number, because the mean of its divisors is an integer number (6857089911).

Almost surely, 2^99904749893 is an apocalyptic number.

It is an amenable number.

99904749893 is a deficient number, since it is larger than the sum of its proper divisors (9808688683).

99904749893 is a wasteful number, since it uses less digits than its factorization.

99904749893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124024.

The product of its (nonzero) digits is 158723712, while the sum is 71.

The spelling of 99904749893 in words is "ninety-nine billion, nine hundred four million, seven hundred forty-nine thousand, eight hundred ninety-three".