399116155 has 8 divisors (see below), whose sum is σ = 479297952. Its totient is φ = 319053888.

The previous prime is 399116111. The next prime is 399116161. The reversal of 399116155 is 551611993.

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

It is a cyclic number.

It is not a de Polignac number, because 399116155 - 2¹⁹ = 398591867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22362 + ... + 36031.

It is an arithmetic number, because the mean of its divisors is an integer number (59912244).

Almost surely, 2^399116155 is an apocalyptic number.

399116155 is a deficient number, since it is larger than the sum of its proper divisors (80181797).

399116155 is a wasteful number, since it uses less digits than its factorization.

399116155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59765.

The product of its digits is 36450, while the sum is 40.

The square root of 399116155 is about 19977.8916555276. The cubic root of 399116155 is about 736.2632140585.

The spelling of 399116155 in words is "three hundred ninety-nine million, one hundred sixteen thousand, one hundred fifty-five".