399226573 has 4 divisors (see below), whose sum is σ = 400020768. Its totient is φ = 398432380.

The previous prime is 399226567. The next prime is 399226591. The reversal of 399226573 is 375622993.

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, and also an emirpimes, since its reverse is a distinct semiprime: 375622993 = 29 ⋅12952517.

It is a cyclic number.

It is not a de Polignac number, because 399226573 - 2²⁵ = 365672141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399226073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396343 + ... + 397348.

It is an arithmetic number, because the mean of its divisors is an integer number (100005192).

Almost surely, 2^399226573 is an apocalyptic number.

It is an amenable number.

399226573 is a deficient number, since it is larger than the sum of its proper divisors (794195).

399226573 is an equidigital number, since it uses as much as digits as its factorization.

399226573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794194.

The product of its digits is 612360, while the sum is 46.

The square root of 399226573 is about 19980.6549692446. The cubic root of 399226573 is about 736.3311050844.

The spelling of 399226573 in words is "three hundred ninety-nine million, two hundred twenty-six thousand, five hundred seventy-three".