397591 has 2 divisors, whose sum is σ = 397592. Its totient is φ = 397590.

The previous prime is 397589. The next prime is 397597. The reversal of 397591 is 195793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397591 - 2¹ = 397589 is a prime.

Together with 397589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198795 + 198796.

It is an arithmetic number, because the mean of its divisors is an integer number (198796).

2³⁹⁷⁵⁹¹ is an apocalyptic number.

397591 is a deficient number, since it is larger than the sum of its proper divisors (1).

397591 is an equidigital number, since it uses as much as digits as its factorization.

397591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505, while the sum is 34.

The square root of 397591 is about 630.5481742103. The cubic root of 397591 is about 73.5324181735.

The spelling of 397591 in words is "three hundred ninety-seven thousand, five hundred ninety-one".