397748243 has 8 divisors (see below), whose sum is σ = 404869920. Its totient is φ = 390646080.

The previous prime is 397748213. The next prime is 397748249. The reversal of 397748243 is 342847793.

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

It is a cyclic number.

It is not a de Polignac number, because 397748243 - 2¹⁶ = 397682707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397748249) 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, 39863 + ... + 48831.

It is an arithmetic number, because the mean of its divisors is an integer number (50608740).

Almost surely, 2^397748243 is an apocalyptic number.

397748243 is a deficient number, since it is larger than the sum of its proper divisors (7121677).

397748243 is an equidigital number, since it uses as much as digits as its factorization.

397748243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757.

The product of its digits is 1016064, while the sum is 47.

The square root of 397748243 is about 19943.6266260678. The cubic root of 397748243 is about 735.4211065828.

The spelling of 397748243 in words is "three hundred ninety-seven million, seven hundred forty-eight thousand, two hundred forty-three".