631104869 has 2 divisors, whose sum is σ = 631104870. Its totient is φ = 631104868.

The previous prime is 631104829. The next prime is 631104907. The reversal of 631104869 is 968401136.

It is an a-pointer prime, because the next prime (631104907) can be obtained adding 631104869 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592192225 + 38912644 = 24335^2 + 6238^2 .

It is a cyclic number.

It is not a de Polignac number, because 631104869 - 2²⁰ = 630056293 is a prime.

It is a super-2 number, since 2×631104869² = 796586711351014322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631104829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315552434 + 315552435.

It is an arithmetic number, because the mean of its divisors is an integer number (315552435).

Almost surely, 2^631104869 is an apocalyptic number.

It is an amenable number.

631104869 is a deficient number, since it is larger than the sum of its proper divisors (1).

631104869 is an equidigital number, since it uses as much as digits as its factorization.

631104869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 631104869 is about 25121.8006719264. The cubic root of 631104869 is about 857.7627395147.

The spelling of 631104869 in words is "six hundred thirty-one million, one hundred four thousand, eight hundred sixty-nine".