399474969 has 8 divisors (see below), whose sum is σ = 533171520. Its totient is φ = 266047536.

The previous prime is 399474947. The next prime is 399474973. The reversal of 399474969 is 969474993.

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

It is not a de Polignac number, because 399474969 - 2⁹ = 399474457 is a prime.

It is a super-2 number, since 2×399474969² = 319160501715101922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (399474989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63789 + ... + 69770.

It is an arithmetic number, because the mean of its divisors is an integer number (66646440).

Almost surely, 2^399474969 is an apocalyptic number.

It is an amenable number.

399474969 is a deficient number, since it is larger than the sum of its proper divisors (133696551).

399474969 is a wasteful number, since it uses less digits than its factorization.

399474969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134559.

The product of its digits is 13226976, while the sum is 60.

The square root of 399474969 is about 19986.8699150217. The cubic root of 399474969 is about 736.4837867889.

The spelling of 399474969 in words is "three hundred ninety-nine million, four hundred seventy-four thousand, nine hundred sixty-nine".