999376109 has 16 divisors (see below), whose sum is σ = 1054080000. Its totient is φ = 946183680.

The previous prime is 999376099. The next prime is 999376129. The reversal of 999376109 is 901673999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999376109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999376129) 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, 799517 + ... + 800765.

It is an arithmetic number, because the mean of its divisors is an integer number (65880000).

Almost surely, 2^999376109 is an apocalyptic number.

It is an amenable number.

999376109 is a deficient number, since it is larger than the sum of its proper divisors (54703891).

999376109 is a wasteful number, since it uses less digits than its factorization.

999376109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820.

The product of its (nonzero) digits is 826686, while the sum is 53.

The square root of 999376109 is about 31612.9104797391. The cubic root of 999376109 is about 999.7919930695.

The spelling of 999376109 in words is "nine hundred ninety-nine million, three hundred seventy-six thousand, one hundred nine".