631867 has 2 divisors, whose sum is σ = 631868. Its totient is φ = 631866.

The previous prime is 631861. The next prime is 631889. The reversal of 631867 is 768136.

631867 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 631867 - 2³ = 631859 is a prime.

It is not a weakly prime, because it can be changed into another prime (631861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315933 + 315934.

It is an arithmetic number, because the mean of its divisors is an integer number (315934).

2⁶³¹⁸⁶⁷ is an apocalyptic number.

631867 is a deficient number, since it is larger than the sum of its proper divisors (1).

631867 is an equidigital number, since it uses as much as digits as its factorization.

631867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 631867 is about 794.9006227196. The cubic root of 631867 is about 85.8107882682.

The spelling of 631867 in words is "six hundred thirty-one thousand, eight hundred sixty-seven".