399158139 has 8 divisors (see below), whose sum is σ = 549379072. Its totient is φ = 257521320.

The previous prime is 399158129. The next prime is 399158141. The reversal of 399158139 is 931851993.

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

It is not a de Polignac number, because 399158139 - 2⁵ = 399158107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399158119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2145919 + ... + 2146104.

It is an arithmetic number, because the mean of its divisors is an integer number (68672384).

Almost surely, 2^399158139 is an apocalyptic number.

399158139 is a deficient number, since it is larger than the sum of its proper divisors (150220933).

399158139 is a wasteful number, since it uses less digits than its factorization.

399158139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292057.

The product of its digits is 262440, while the sum is 48.

The square root of 399158139 is about 19978.9423894259. The cubic root of 399158139 is about 736.2890295933.

The spelling of 399158139 in words is "three hundred ninety-nine million, one hundred fifty-eight thousand, one hundred thirty-nine".