397840367 has 2 divisors, whose sum is σ = 397840368. Its totient is φ = 397840366.

The previous prime is 397840351. The next prime is 397840393. The reversal of 397840367 is 763048793.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397840367 - 2⁴ = 397840351 is a prime.

It is a super-2 number, since 2×397840367² = 316553915229389378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397840337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198920183 + 198920184.

It is an arithmetic number, because the mean of its divisors is an integer number (198920184).

Almost surely, 2^397840367 is an apocalyptic number.

397840367 is a deficient number, since it is larger than the sum of its proper divisors (1).

397840367 is an equidigital number, since it uses as much as digits as its factorization.

397840367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The square root of 397840367 is about 19945.9361023743. The cubic root of 397840367 is about 735.4778801033.

The spelling of 397840367 in words is "three hundred ninety-seven million, eight hundred forty thousand, three hundred sixty-seven".