379987999 has 4 divisors (see below), whose sum is σ = 380350600. Its totient is φ = 379625400.

The previous prime is 379987969. The next prime is 379988003. The reversal of 379987999 is 999789973.

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 379987999 - 2⁷ = 379987871 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 (379987969) 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, 179724 + ... + 181825.

It is an arithmetic number, because the mean of its divisors is an integer number (95087650).

Almost surely, 2^379987999 is an apocalyptic number.

379987999 is a deficient number, since it is larger than the sum of its proper divisors (362601).

379987999 is a wasteful number, since it uses less digits than its factorization.

379987999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362600.

The product of its digits is 69441624, while the sum is 70.

The square root of 379987999 is about 19493.2808680325. The cubic root of 379987999 is about 724.3080192533.

It can be divided in two parts, 37 and 9987999, that multiplied together give a palindrome (369555963).

The spelling of 379987999 in words is "three hundred seventy-nine million, nine hundred eighty-seven thousand, nine hundred ninety-nine".