631339 has 2 divisors, whose sum is σ = 631340. Its totient is φ = 631338.

The previous prime is 631307. The next prime is 631357. The reversal of 631339 is 933136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631339 - 2⁵ = 631307 is a prime.

It is not a weakly prime, because it can be changed into another prime (631399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315669 + 315670.

It is an arithmetic number, because the mean of its divisors is an integer number (315670).

2⁶³¹³³⁹ is an apocalyptic number.

631339 is a deficient number, since it is larger than the sum of its proper divisors (1).

631339 is an equidigital number, since it uses as much as digits as its factorization.

631339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 25.

The square root of 631339 is about 794.5684363225. The cubic root of 631339 is about 85.7868799024.

The spelling of 631339 in words is "six hundred thirty-one thousand, three hundred thirty-nine".