397739273 has 4 divisors (see below), whose sum is σ = 398168340. Its totient is φ = 397310208.

The previous prime is 397739267. The next prime is 397739281. The reversal of 397739273 is 372937793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372937793 = 353 ⋅1056481.

It can be written as a sum of positive squares in 2 ways, for example, as 30327049 + 367412224 = 5507^2 + 19168^2 .

It is a cyclic number.

It is not a de Polignac number, because 397739273 - 2¹⁴ = 397722889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397739203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213140 + ... + 214997.

It is an arithmetic number, because the mean of its divisors is an integer number (99542085).

Almost surely, 2^397739273 is an apocalyptic number.

It is an amenable number.

397739273 is a deficient number, since it is larger than the sum of its proper divisors (429067).

397739273 is an equidigital number, since it uses as much as digits as its factorization.

397739273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429066.

The product of its digits is 1500282, while the sum is 50.

The square root of 397739273 is about 19943.4017409267. The cubic root of 397739273 is about 735.4155781469.

The spelling of 397739273 in words is "three hundred ninety-seven million, seven hundred thirty-nine thousand, two hundred seventy-three".