379961999 has 2 divisors, whose sum is σ = 379962000. Its totient is φ = 379961998.

The previous prime is 379961987. The next prime is 379962013. The reversal of 379961999 is 999169973.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 379961999 - 2²⁸ = 111526543 is a prime.

It is a super-2 number, since 2×379961999² = 288742241368152002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (379963999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189980999 + 189981000.

It is an arithmetic number, because the mean of its divisors is an integer number (189981000).

Almost surely, 2^379961999 is an apocalyptic number.

379961999 is a deficient number, since it is larger than the sum of its proper divisors (1).

379961999 is an equidigital number, since it uses as much as digits as its factorization.

379961999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7440174, while the sum is 62.

The square root of 379961999 is about 19492.6139601645. The cubic root of 379961999 is about 724.2914990491.

The spelling of 379961999 in words is "three hundred seventy-nine million, nine hundred sixty-one thousand, nine hundred ninety-nine".