635431 has 2 divisors, whose sum is σ = 635432. Its totient is φ = 635430.

The previous prime is 635423. The next prime is 635441. The reversal of 635431 is 134536.

635431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 635431 - 2³ = 635423 is a prime.

It is a super-2 number, since 2×635431² = 807545111522, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 14.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317715 + 317716.

It is an arithmetic number, because the mean of its divisors is an integer number (317716).

2⁶³⁵⁴³¹ is an apocalyptic number.

635431 is a deficient number, since it is larger than the sum of its proper divisors (1).

635431 is an equidigital number, since it uses as much as digits as its factorization.

635431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 22.

The square root of 635431 is about 797.1392601045. The cubic root of 635431 is about 85.9718223894.

Adding to 635431 its reverse (134536), we get a palindrome (769967).

The spelling of 635431 in words is "six hundred thirty-five thousand, four hundred thirty-one".