379816991 has 6 divisors (see below), whose sum is σ = 392465376. Its totient is φ = 367563900.

The previous prime is 379816981. The next prime is 379816993. The reversal of 379816991 is 199618973.

It is not a de Polignac number, because 379816991 - 2¹⁴ = 379800607 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 (379816993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196655 + ... + 198576.

It is an arithmetic number, because the mean of its divisors is an integer number (65410896).

Almost surely, 2^379816991 is an apocalyptic number.

379816991 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

379816991 is a deficient number, since it is larger than the sum of its proper divisors (12648385).

379816991 is an equidigital number, since it uses as much as digits as its factorization.

379816991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395293 (or 395262 counting only the distinct ones).

The product of its digits is 734832, while the sum is 53.

The square root of 379816991 is about 19488.8940425053. The cubic root of 379816991 is about 724.1993482325.

The spelling of 379816991 in words is "three hundred seventy-nine million, eight hundred sixteen thousand, nine hundred ninety-one".