399973273 has 4 divisors (see below), whose sum is σ = 457112320. Its totient is φ = 342834228.

The previous prime is 399973271. The next prime is 399973283. The reversal of 399973273 is 372379993.

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 399973273 - 2¹ = 399973271 is a prime.

It is a super-2 number, since 2×399973273² = 319957238228665058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399973273.

It is not an unprimeable number, because it can be changed into a prime (399973271) 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, 28569513 + ... + 28569526.

It is an arithmetic number, because the mean of its divisors is an integer number (114278080).

Almost surely, 2^399973273 is an apocalyptic number.

It is an amenable number.

399973273 is a deficient number, since it is larger than the sum of its proper divisors (57139047).

399973273 is an equidigital number, since it uses as much as digits as its factorization.

399973273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57139046.

The product of its digits is 1928934, while the sum is 52.

The square root of 399973273 is about 19999.3318138382. The cubic root of 399973273 is about 736.7898888442.

The spelling of 399973273 in words is "three hundred ninety-nine million, nine hundred seventy-three thousand, two hundred seventy-three".