379928999 has 4 divisors (see below), whose sum is σ = 380010000. Its totient is φ = 379848000.

The previous prime is 379928981. The next prime is 379929007. The reversal of 379928999 is 999829973.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 379928999 - 2¹² = 379924903 is a prime.

It is a super-2 number, since 2×379928999² = 288692088562284002, which 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 (379928299) 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, 33002 + ... + 42999.

It is an arithmetic number, because the mean of its divisors is an integer number (95002500).

Almost surely, 2^379928999 is an apocalyptic number.

379928999 is a deficient number, since it is larger than the sum of its proper divisors (81001).

379928999 is an equidigital number, since it uses as much as digits as its factorization.

379928999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81000.

The product of its digits is 19840464, while the sum is 65.

The square root of 379928999 is about 19491.7674673181. The cubic root of 379928999 is about 724.2705300123.

The spelling of 379928999 in words is "three hundred seventy-nine million, nine hundred twenty-eight thousand, nine hundred ninety-nine".