999392117 has 4 divisors (see below), whose sum is σ = 1003873920. Its totient is φ = 994910316.

The previous prime is 999392063. The next prime is 999392131. The reversal of 999392117 is 711293999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 999392117 - 2¹⁰ = 999391093 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 (999392717) 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, 2240567 + ... + 2241012.

It is an arithmetic number, because the mean of its divisors is an integer number (250968480).

Almost surely, 2^999392117 is an apocalyptic number.

It is an amenable number.

999392117 is a deficient number, since it is larger than the sum of its proper divisors (4481803).

999392117 is a wasteful number, since it uses less digits than its factorization.

999392117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481802.

The product of its digits is 275562, while the sum is 50.

The square root of 999392117 is about 31613.1636664223. The cubic root of 999392117 is about 999.7973312615.

The spelling of 999392117 in words is "nine hundred ninety-nine million, three hundred ninety-two thousand, one hundred seventeen".