999383947 has 8 divisors (see below), whose sum is σ = 1061317296. Its totient is φ = 937800192.

The previous prime is 999383929. The next prime is 999383951. The reversal of 999383947 is 749383999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999383947 - 2²³ = 990995339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999383927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81493 + ... + 92950.

It is an arithmetic number, because the mean of its divisors is an integer number (132664662).

Almost surely, 2^999383947 is an apocalyptic number.

999383947 is a deficient number, since it is larger than the sum of its proper divisors (61933349).

999383947 is a wasteful number, since it uses less digits than its factorization.

999383947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174797.

The product of its digits is 13226976, while the sum is 61.

The square root of 999383947 is about 31613.0344478350. The cubic root of 999383947 is about 999.7946068165.

The spelling of 999383947 in words is "nine hundred ninety-nine million, three hundred eighty-three thousand, nine hundred forty-seven".