397306747 has 2 divisors, whose sum is σ = 397306748. Its totient is φ = 397306746.

The previous prime is 397306727. The next prime is 397306753. The reversal of 397306747 is 747603793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397306747 - 2¹⁵ = 397273979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397306697 and 397306706.

It is not a weakly prime, because it can be changed into another prime (397306727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198653373 + 198653374.

It is an arithmetic number, because the mean of its divisors is an integer number (198653374).

Almost surely, 2^397306747 is an apocalyptic number.

397306747 is a deficient number, since it is larger than the sum of its proper divisors (1).

397306747 is an equidigital number, since it uses as much as digits as its factorization.

397306747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 46.

The square root of 397306747 is about 19932.5549541447. The cubic root of 397306747 is about 735.1489028382.

The spelling of 397306747 in words is "three hundred ninety-seven million, three hundred six thousand, seven hundred forty-seven".