399422973 has 16 divisors (see below), whose sum is σ = 571034880. Its totient is φ = 247443456.

The previous prime is 399422963. The next prime is 399422981. The reversal of 399422973 is 379224993.

It is not a de Polignac number, because 399422973 - 2⁶ = 399422909 is a prime.

It is a super-2 number, since 2×399422973² = 319077422720317458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399422953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45540 + ... + 53597.

It is an arithmetic number, because the mean of its divisors is an integer number (35689680).

Almost surely, 2^399422973 is an apocalyptic number.

It is an amenable number.

399422973 is a deficient number, since it is larger than the sum of its proper divisors (171611907).

399422973 is a wasteful number, since it uses less digits than its factorization.

399422973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99236.

The product of its digits is 734832, while the sum is 48.

The square root of 399422973 is about 19985.5691187417. The cubic root of 399422973 is about 736.4518316181.

The spelling of 399422973 in words is "three hundred ninety-nine million, four hundred twenty-two thousand, nine hundred seventy-three".