397442253 has 8 divisors (see below), whose sum is σ = 570686368. Its totient is φ = 244579824.

The previous prime is 397442251. The next prime is 397442261. The reversal of 397442253 is 352244793.

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

It is not a de Polignac number, because 397442253 - 2¹ = 397442251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 10190827 = 397442253 / (3 + 9 + 7 + 4 + 4 + 2 + 2 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397442251) 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 7 ways as a sum of consecutive naturals, for example, 5095375 + ... + 5095452.

It is an arithmetic number, because the mean of its divisors is an integer number (71335796).

Almost surely, 2^397442253 is an apocalyptic number.

It is an amenable number.

397442253 is a deficient number, since it is larger than the sum of its proper divisors (173244115).

397442253 is a wasteful number, since it uses less digits than its factorization.

397442253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10190843.

The product of its digits is 181440, while the sum is 39.

The square root of 397442253 is about 19935.9537770331. The cubic root of 397442253 is about 735.2324703126.

The spelling of 397442253 in words is "three hundred ninety-seven million, four hundred forty-two thousand, two hundred fifty-three".