397072853 has 2 divisors, whose sum is σ = 397072854. Its totient is φ = 397072852.

The previous prime is 397072813. The next prime is 397072903. The reversal of 397072853 is 358270793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235223569 + 161849284 = 15337^2 + 12722^2 .

It is a cyclic number.

It is not a de Polignac number, because 397072853 - 2⁸ = 397072597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397072813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198536426 + 198536427.

It is an arithmetic number, because the mean of its divisors is an integer number (198536427).

Almost surely, 2^397072853 is an apocalyptic number.

It is an amenable number.

397072853 is a deficient number, since it is larger than the sum of its proper divisors (1).

397072853 is an equidigital number, since it uses as much as digits as its factorization.

397072853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 397072853 is about 19926.6869549356. The cubic root of 397072853 is about 735.0046140979.

The spelling of 397072853 in words is "three hundred ninety-seven million, seventy-two thousand, eight hundred fifty-three".