591431 has 2 divisors, whose sum is σ = 591432. Its totient is φ = 591430.

The previous prime is 591421. The next prime is 591443. The reversal of 591431 is 134195.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 591431 - 2¹⁰ = 590407 is a prime.

It is a super-2 number, since 2×591431² = 699581255522, which contains 22 as substring.

It is a Chen prime.

It is equal to p₄₈₄₅₂ and since 591431 and 48452 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 591397 and 591406.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 591431.

It is not a weakly prime, because it can be changed into another prime (591421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295715 + 295716.

It is an arithmetic number, because the mean of its divisors is an integer number (295716).

2⁵⁹¹⁴³¹ is an apocalyptic number.

591431 is a deficient number, since it is larger than the sum of its proper divisors (1).

591431 is an equidigital number, since it uses as much as digits as its factorization.

591431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 23.

The square root of 591431 is about 769.0455123073. The cubic root of 591431 is about 83.9398189501.

The spelling of 591431 in words is "five hundred ninety-one thousand, four hundred thirty-one".