399167051 has 4 divisors (see below), whose sum is σ = 399207600. Its totient is φ = 399126504.

The previous prime is 399167033. The next prime is 399167059. The reversal of 399167051 is 150761993.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399167051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399167059) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4970 + ... + 28688.

It is an arithmetic number, because the mean of its divisors is an integer number (99801900).

Almost surely, 2^399167051 is an apocalyptic number.

399167051 is a deficient number, since it is larger than the sum of its proper divisors (40549).

399167051 is a wasteful number, since it uses less digits than its factorization.

399167051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40548.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 399167051 is about 19979.1654230100. The cubic root of 399167051 is about 736.2945092586.

The spelling of 399167051 in words is "three hundred ninety-nine million, one hundred sixty-seven thousand, fifty-one".