397229393 has 4 divisors (see below), whose sum is σ = 433341168. Its totient is φ = 361117620.

The previous prime is 397229387. The next prime is 397229401. The reversal of 397229393 is 393922793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 397229393 - 2⁸ = 397229137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397229323) 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 3 ways as a sum of consecutive naturals, for example, 18055871 + ... + 18055892.

It is an arithmetic number, because the mean of its divisors is an integer number (108335292).

Almost surely, 2^397229393 is an apocalyptic number.

It is an amenable number.

397229393 is a deficient number, since it is larger than the sum of its proper divisors (36111775).

397229393 is a wasteful number, since it uses less digits than its factorization.

397229393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36111774.

The product of its digits is 551124, while the sum is 47.

The square root of 397229393 is about 19930.6144661925. The cubic root of 397229393 is about 735.1011895792.

The spelling of 397229393 in words is "three hundred ninety-seven million, two hundred twenty-nine thousand, three hundred ninety-three".