397293447 has 4 divisors (see below), whose sum is σ = 529724600. Its totient is φ = 264862296.

The previous prime is 397293431. The next prime is 397293487. The reversal of 397293447 is 744392793.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 397293447 - 2⁴ = 397293431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397293396 and 397293405.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66215572 + ... + 66215577.

It is an arithmetic number, because the mean of its divisors is an integer number (132431150).

Almost surely, 2^397293447 is an apocalyptic number.

397293447 is a deficient number, since it is larger than the sum of its proper divisors (132431153).

397293447 is a wasteful number, since it uses less digits than its factorization.

397293447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132431152.

The product of its digits is 1143072, while the sum is 48.

The square root of 397293447 is about 19932.2213262847. The cubic root of 397293447 is about 735.1406996136.

The spelling of 397293447 in words is "three hundred ninety-seven million, two hundred ninety-three thousand, four hundred forty-seven".