634531 has 2 divisors, whose sum is σ = 634532. Its totient is φ = 634530.

The previous prime is 634523. The next prime is 634541. The reversal of 634531 is 135436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634531 - 2³ = 634523 is a prime.

It is a super-2 number, since 2×634531² = 805259179922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634511) 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, 317265 + 317266.

It is an arithmetic number, because the mean of its divisors is an integer number (317266).

2⁶³⁴⁵³¹ is an apocalyptic number.

634531 is a deficient number, since it is larger than the sum of its proper divisors (1).

634531 is an equidigital number, since it uses as much as digits as its factorization.

634531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 634531 is about 796.5745413958. The cubic root of 634531 is about 85.9312141518.

Adding to 634531 its reverse (135436), we get a palindrome (769967).

The spelling of 634531 in words is "six hundred thirty-four thousand, five hundred thirty-one".