397495509243 has 48 divisors (see below), whose sum is σ = 651186197760. Its totient is φ = 211203177984.

The previous prime is 397495509233. The next prime is 397495509317. The reversal of 397495509243 is 342905594793.

It is not a de Polignac number, because 397495509243 - 2²² = 397491314939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397495509223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109173 + ... + 898281.

It is an arithmetic number, because the mean of its divisors is an integer number (13566379120).

Almost surely, 2^397495509243 is an apocalyptic number.

397495509243 is a deficient number, since it is larger than the sum of its proper divisors (253690688517).

397495509243 is a wasteful number, since it uses less digits than its factorization.

397495509243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789236 (or 789219 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 60.

The spelling of 397495509243 in words is "three hundred ninety-seven billion, four hundred ninety-five million, five hundred nine thousand, two hundred forty-three".