631723 has 2 divisors, whose sum is σ = 631724. Its totient is φ = 631722.

The previous prime is 631717. The next prime is 631733. The reversal of 631723 is 327136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631723 - 2¹³ = 623531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631694 and 631703.

It is not a weakly prime, because it can be changed into another prime (631733) 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, 315861 + 315862.

It is an arithmetic number, because the mean of its divisors is an integer number (315862).

2⁶³¹⁷²³ is an apocalyptic number.

631723 is a deficient number, since it is larger than the sum of its proper divisors (1).

631723 is an equidigital number, since it uses as much as digits as its factorization.

631723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 22.

The square root of 631723 is about 794.8100401983. The cubic root of 631723 is about 85.8042691261.

Adding to 631723 its reverse (327136), we get a palindrome (958859).

The spelling of 631723 in words is "six hundred thirty-one thousand, seven hundred twenty-three".