399252955 has 4 divisors (see below), whose sum is σ = 479103552. Its totient is φ = 319402360.

The previous prime is 399252923. The next prime is 399252967. The reversal of 399252955 is 559252993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 559252993 = 13 ⋅43019461.

It is not a de Polignac number, because 399252955 - 2⁵ = 399252923 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399252899 and 399252908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39925291 + ... + 39925300.

It is an arithmetic number, because the mean of its divisors is an integer number (119775888).

Almost surely, 2^399252955 is an apocalyptic number.

399252955 is a deficient number, since it is larger than the sum of its proper divisors (79850597).

399252955 is an equidigital number, since it uses as much as digits as its factorization.

399252955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79850596.

The product of its digits is 1093500, while the sum is 49.

The square root of 399252955 is about 19981.3151469066. The cubic root of 399252955 is about 736.3473243282.

The spelling of 399252955 in words is "three hundred ninety-nine million, two hundred fifty-two thousand, nine hundred fifty-five".