631472617 has 2 divisors, whose sum is σ = 631472618. Its totient is φ = 631472616.

The previous prime is 631472609. The next prime is 631472641. The reversal of 631472617 is 716274136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407192041 + 224280576 = 20179^2 + 14976^2 .

It is a cyclic number.

It is not a de Polignac number, because 631472617 - 2³ = 631472609 is a prime.

It is not a weakly prime, because it can be changed into another prime (631472117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315736308 + 315736309.

It is an arithmetic number, because the mean of its divisors is an integer number (315736309).

Almost surely, 2^631472617 is an apocalyptic number.

It is an amenable number.

631472617 is a deficient number, since it is larger than the sum of its proper divisors (1).

631472617 is an equidigital number, since it uses as much as digits as its factorization.

631472617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 631472617 is about 25129.1189061614. The cubic root of 631472617 is about 857.9293147268.

The spelling of 631472617 in words is "six hundred thirty-one million, four hundred seventy-two thousand, six hundred seventeen".