397807 has 2 divisors, whose sum is σ = 397808. Its totient is φ = 397806.

The previous prime is 397799. The next prime is 397811. The reversal of 397807 is 708793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397807 - 2³ = 397799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198903 + 198904.

It is an arithmetic number, because the mean of its divisors is an integer number (198904).

2³⁹⁷⁸⁰⁷ is an apocalyptic number.

397807 is a deficient number, since it is larger than the sum of its proper divisors (1).

397807 is an equidigital number, since it uses as much as digits as its factorization.

397807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 397807 is about 630.7194304919. The cubic root of 397807 is about 73.5457317939.

The spelling of 397807 in words is "three hundred ninety-seven thousand, eight hundred seven".