397293457 has 12 divisors (see below), whose sum is σ = 448502068. Its totient is φ = 351410400.

The previous prime is 397293431. The next prime is 397293487. The reversal of 397293457 is 754392793.

It can be written as a sum of positive squares in 2 ways, for example, as 229098496 + 168194961 = 15136^2 + 12969^2 .

It is not a de Polignac number, because 397293457 - 2¹¹ = 397291409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397293457.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397293487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39894 + ... + 48847.

Almost surely, 2^397293457 is an apocalyptic number.

397293457 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

397293457 is a deficient number, since it is larger than the sum of its proper divisors (51208611).

397293457 is a wasteful number, since it uses less digits than its factorization.

397293457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88800 (or 88789 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 49.

The square root of 397293457 is about 19932.2215771348. The cubic root of 397293457 is about 735.1407057815.

The spelling of 397293457 in words is "three hundred ninety-seven million, two hundred ninety-three thousand, four hundred fifty-seven".