399767473 has 4 divisors (see below), whose sum is σ = 456877120. Its totient is φ = 342657828.

The previous prime is 399767471. The next prime is 399767479. The reversal of 399767473 is 374767993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 399767473 - 2¹ = 399767471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399767471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28554813 + ... + 28554826.

It is an arithmetic number, because the mean of its divisors is an integer number (114219280).

Almost surely, 2^399767473 is an apocalyptic number.

It is an amenable number.

399767473 is a deficient number, since it is larger than the sum of its proper divisors (57109647).

399767473 is an equidigital number, since it uses as much as digits as its factorization.

399767473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57109646.

The product of its digits is 6001128, while the sum is 55.

The square root of 399767473 is about 19994.1859799293. The cubic root of 399767473 is about 736.6634992550.

The spelling of 399767473 in words is "three hundred ninety-nine million, seven hundred sixty-seven thousand, four hundred seventy-three".