631573 has 2 divisors, whose sum is σ = 631574. Its totient is φ = 631572.

The previous prime is 631559. The next prime is 631577. The reversal of 631573 is 375136.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552049 + 79524 = 743^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 631573 - 2⁹ = 631061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315786 + 315787.

It is an arithmetic number, because the mean of its divisors is an integer number (315787).

2⁶³¹⁵⁷³ is an apocalyptic number.

It is an amenable number.

631573 is a deficient number, since it is larger than the sum of its proper divisors (1).

631573 is an equidigital number, since it uses as much as digits as its factorization.

631573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 25.

The square root of 631573 is about 794.7156724263. The cubic root of 631573 is about 85.7974772995.

It can be divided in two parts, 63 and 1573, that multiplied together give a palindrome (99099).

The spelling of 631573 in words is "six hundred thirty-one thousand, five hundred seventy-three".