395431 has 2 divisors, whose sum is σ = 395432. Its totient is φ = 395430.

The previous prime is 395429. The next prime is 395443. The reversal of 395431 is 134593.

It is a weak prime.

It is an emirp because it is prime and its reverse (134593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395431 - 2¹ = 395429 is a prime.

It is a super-2 number, since 2×395431² = 312731351522, which contains 22 as substring.

Together with 395429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 395396 and 395405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197715 + 197716.

It is an arithmetic number, because the mean of its divisors is an integer number (197716).

2³⁹⁵⁴³¹ is an apocalyptic number.

395431 is a deficient number, since it is larger than the sum of its proper divisors (1).

395431 is an equidigital number, since it uses as much as digits as its factorization.

395431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 395431 is about 628.8330462054. The cubic root of 395431 is about 73.3990159916.

The spelling of 395431 in words is "three hundred ninety-five thousand, four hundred thirty-one".