397424397 has 8 divisors (see below), whose sum is σ = 529993600. Its totient is φ = 264902400.

The previous prime is 397424389. The next prime is 397424399. The reversal of 397424397 is 793424793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397424397 - 2³ = 397424389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397424399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20397 + ... + 34797.

It is an arithmetic number, because the mean of its divisors is an integer number (66249200).

Almost surely, 2^397424397 is an apocalyptic number.

It is an amenable number.

397424397 is a deficient number, since it is larger than the sum of its proper divisors (132569203).

397424397 is a wasteful number, since it uses less digits than its factorization.

397424397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23603.

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

The square root of 397424397 is about 19935.5059378988. The cubic root of 397424397 is about 735.2214594823.

The spelling of 397424397 in words is "three hundred ninety-seven million, four hundred twenty-four thousand, three hundred ninety-seven".