397273437 has 16 divisors (see below), whose sum is σ = 642058560. Its totient is φ = 240771600.

The previous prime is 397273421. The next prime is 397273453. The reversal of 397273437 is 734372793.

It is an interprime number because it is at equal distance from previous prime (397273421) and next prime (397273453).

It is not a de Polignac number, because 397273437 - 2⁴ = 397273421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397273392 and 397273401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397273237) 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 15 ways as a sum of consecutive naturals, for example, 668514 + ... + 669107.

It is an arithmetic number, because the mean of its divisors is an integer number (40128660).

Almost surely, 2^397273437 is an apocalyptic number.

It is an amenable number.

397273437 is a deficient number, since it is larger than the sum of its proper divisors (244785123).

397273437 is a wasteful number, since it uses less digits than its factorization.

397273437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337641 (or 1337635 counting only the distinct ones).

The product of its digits is 666792, while the sum is 45.

The square root of 397273437 is about 19931.7193688854. The cubic root of 397273437 is about 735.1283574246.

The spelling of 397273437 in words is "three hundred ninety-seven million, two hundred seventy-three thousand, four hundred thirty-seven".