631205713 has 2 divisors, whose sum is σ = 631205714. Its totient is φ = 631205712.

The previous prime is 631205671. The next prime is 631205719. The reversal of 631205713 is 317502136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451860049 + 179345664 = 21257^2 + 13392^2 .

It is a cyclic number.

It is not a de Polignac number, because 631205713 - 2¹³ = 631197521 is a prime.

It is not a weakly prime, because it can be changed into another prime (631205719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315602856 + 315602857.

It is an arithmetic number, because the mean of its divisors is an integer number (315602857).

Almost surely, 2^631205713 is an apocalyptic number.

It is an amenable number.

631205713 is a deficient number, since it is larger than the sum of its proper divisors (1).

631205713 is an equidigital number, since it uses as much as digits as its factorization.

631205713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 631205713 is about 25123.8076931026. The cubic root of 631205713 is about 857.8084242723.

Adding to 631205713 its reverse (317502136), we get a palindrome (948707849).

The spelling of 631205713 in words is "six hundred thirty-one million, two hundred five thousand, seven hundred thirteen".