399252949 has 8 divisors (see below), whose sum is σ = 401748480. Its totient is φ = 396765600.

The previous prime is 399252923. The next prime is 399252967. The reversal of 399252949 is 949252993.

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 399252949 - 2⁹ = 399252437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399252896 and 399252905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399252989) 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 7 ways as a sum of consecutive naturals, for example, 116044 + ... + 119434.

It is an arithmetic number, because the mean of its divisors is an integer number (50218560).

Almost surely, 2^399252949 is an apocalyptic number.

It is an amenable number.

399252949 is a deficient number, since it is larger than the sum of its proper divisors (2495531).

399252949 is a wasteful number, since it uses less digits than its factorization.

399252949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091.

The product of its digits is 1574640, while the sum is 52.

The square root of 399252949 is about 19981.3149967664. The cubic root of 399252949 is about 736.3473206395.

The spelling of 399252949 in words is "three hundred ninety-nine million, two hundred fifty-two thousand, nine hundred forty-nine".