631120249 has 2 divisors, whose sum is σ = 631120250. Its totient is φ = 631120248.

The previous prime is 631120241. The next prime is 631120279. The reversal of 631120249 is 942021136.

631120249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608510224 + 22610025 = 24668^2 + 4755^2 .

It is a cyclic number.

It is not a de Polignac number, because 631120249 - 2³ = 631120241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (631120241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315560124 + 315560125.

It is an arithmetic number, because the mean of its divisors is an integer number (315560125).

Almost surely, 2^631120249 is an apocalyptic number.

It is an amenable number.

631120249 is a deficient number, since it is larger than the sum of its proper divisors (1).

631120249 is an equidigital number, since it uses as much as digits as its factorization.

631120249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 631120249 is about 25122.1067786919. The cubic root of 631120249 is about 857.7697073392.

The spelling of 631120249 in words is "six hundred thirty-one million, one hundred twenty thousand, two hundred forty-nine".