631013626717 has 2 divisors, whose sum is σ = 631013626718. Its totient is φ = 631013626716.

The previous prime is 631013626651. The next prime is 631013626723. The reversal of 631013626717 is 717626310136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593771960356 + 37241666361 = 770566^2 + 192981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631013626717 is a prime.

It is a super-3 number, since 3×631013626717³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631013620717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315506813358 + 315506813359.

It is an arithmetic number, because the mean of its divisors is an integer number (315506813359).

Almost surely, 2^631013626717 is an apocalyptic number.

It is an amenable number.

631013626717 is a deficient number, since it is larger than the sum of its proper divisors (1).

631013626717 is an equidigital number, since it uses as much as digits as its factorization.

631013626717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 631013626717 in words is "six hundred thirty-one billion, thirteen million, six hundred twenty-six thousand, seven hundred seventeen".