397309437 has 24 divisors (see below), whose sum is σ = 690397760. Its totient is φ = 215084160.

The previous prime is 397309433. The next prime is 397309447. The reversal of 397309437 is 734903793.

It is not a de Polignac number, because 397309437 - 2² = 397309433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397309392 and 397309401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397309433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164764 + ... + 167157.

Almost surely, 2^397309437 is an apocalyptic number.

It is an amenable number.

397309437 is a deficient number, since it is larger than the sum of its proper divisors (293088323).

397309437 is a wasteful number, since it uses less digits than its factorization.

397309437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331953 (or 331950 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 45.

The square root of 397309437 is about 19932.6224315819. The cubic root of 397309437 is about 735.1505619644.

The spelling of 397309437 in words is "three hundred ninety-seven million, three hundred nine thousand, four hundred thirty-seven".