631513417 has 2 divisors, whose sum is σ = 631513418. Its totient is φ = 631513416.

The previous prime is 631513387. The next prime is 631513427. The reversal of 631513417 is 714315136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372335616 + 259177801 = 19296^2 + 16099^2 .

It is a cyclic number.

It is not a de Polignac number, because 631513417 - 2¹¹ = 631511369 is a prime.

It is not a weakly prime, because it can be changed into another prime (631513427) 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, 315756708 + 315756709.

It is an arithmetic number, because the mean of its divisors is an integer number (315756709).

Almost surely, 2^631513417 is an apocalyptic number.

It is an amenable number.

631513417 is a deficient number, since it is larger than the sum of its proper divisors (1).

631513417 is an equidigital number, since it uses as much as digits as its factorization.

631513417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 631513417 is about 25129.9307002626. The cubic root of 631513417 is about 857.9477915175.

The spelling of 631513417 in words is "six hundred thirty-one million, five hundred thirteen thousand, four hundred seventeen".