397052317 has 2 divisors, whose sum is σ = 397052318. Its totient is φ = 397052316.
The previous prime is 397052269. The next prime is 397052347. The reversal of 397052317 is 713250793.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 384983641 + 12068676 = 19621^2 + 3474^2 .
It is a cyclic number.
It is not a de Polignac number, because 397052317 - 215 = 397019549 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (397052347) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198526158 + 198526159.
It is an arithmetic number, because the mean of its divisors is an integer number (198526159).
Almost surely, 2397052317 is an apocalyptic number.
It is an amenable number.
397052317 is a deficient number, since it is larger than the sum of its proper divisors (1).
397052317 is an equidigital number, since it uses as much as digits as its factorization.
397052317 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 39690, while the sum is 37.
The square root of 397052317 is about 19926.1716594031. The cubic root of 397052317 is about 734.9919427750.
The spelling of 397052317 in words is "three hundred ninety-seven million, fifty-two thousand, three hundred seventeen".
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