397708937 has 2 divisors, whose sum is σ = 397708938. Its totient is φ = 397708936.

The previous prime is 397708921. The next prime is 397708973. The reversal of 397708937 is 739807793.

It is a happy number.

Together with next prime (397708973) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304991296 + 92717641 = 17464^2 + 9629^2 .

It is a cyclic number.

It is not a de Polignac number, because 397708937 - 2⁴ = 397708921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397708537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198854468 + 198854469.

It is an arithmetic number, because the mean of its divisors is an integer number (198854469).

Almost surely, 2^397708937 is an apocalyptic number.

It is an amenable number.

397708937 is a deficient number, since it is larger than the sum of its proper divisors (1).

397708937 is an equidigital number, since it uses as much as digits as its factorization.

397708937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The square root of 397708937 is about 19942.6411741274. The cubic root of 397708937 is about 735.3968806938.

The spelling of 397708937 in words is "three hundred ninety-seven million, seven hundred eight thousand, nine hundred thirty-seven".