397147273 has 2 divisors, whose sum is σ = 397147274. Its totient is φ = 397147272.

The previous prime is 397147259. The next prime is 397147301. The reversal of 397147273 is 372741793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352951369 + 44195904 = 18787^2 + 6648^2 .

It is an emirp because it is prime and its reverse (372741793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397147273 - 2⁵ = 397147241 is a prime.

It is not a weakly prime, because it can be changed into another prime (397157273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198573636 + 198573637.

It is an arithmetic number, because the mean of its divisors is an integer number (198573637).

Almost surely, 2^397147273 is an apocalyptic number.

It is an amenable number.

397147273 is a deficient number, since it is larger than the sum of its proper divisors (1).

397147273 is an equidigital number, since it uses as much as digits as its factorization.

397147273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 43.

The square root of 397147273 is about 19928.5542124862. The cubic root of 397147273 is about 735.0505297916.

The spelling of 397147273 in words is "three hundred ninety-seven million, one hundred forty-seven thousand, two hundred seventy-three".