631250761 has 2 divisors, whose sum is σ = 631250762. Its totient is φ = 631250760.

The previous prime is 631250729. The next prime is 631250777. The reversal of 631250761 is 167052136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373455625 + 257795136 = 19325^2 + 16056^2 .

It is a cyclic number.

It is not a de Polignac number, because 631250761 - 2⁵ = 631250729 is a prime.

It is not a weakly prime, because it can be changed into another prime (631256761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315625380 + 315625381.

It is an arithmetic number, because the mean of its divisors is an integer number (315625381).

Almost surely, 2^631250761 is an apocalyptic number.

It is an amenable number.

631250761 is a deficient number, since it is larger than the sum of its proper divisors (1).

631250761 is an equidigital number, since it uses as much as digits as its factorization.

631250761 is an odious number, because the sum of its binary digits is odd.

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

The square root of 631250761 is about 25124.7041972637. The cubic root of 631250761 is about 857.8288305275.

The spelling of 631250761 in words is "six hundred thirty-one million, two hundred fifty thousand, seven hundred sixty-one".