1317123761 has 2 divisors, whose sum is σ = 1317123762. Its totient is φ = 1317123760.

The previous prime is 1317123751. The next prime is 1317123767. The reversal of 1317123761 is 1673217131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012830625 + 304293136 = 31825^2 + 17444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317123761 - 2⁶ = 1317123697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317123767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658561880 + 658561881.

It is an arithmetic number, because the mean of its divisors is an integer number (658561881).

Almost surely, 2^1317123761 is an apocalyptic number.

It is an amenable number.

1317123761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317123761 is an equidigital number, since it uses as much as digits as its factorization.

1317123761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 1317123761 is about 36292.1997266630. The cubic root of 1317123761 is about 1096.1639828807.

The spelling of 1317123761 in words is "one billion, three hundred seventeen million, one hundred twenty-three thousand, seven hundred sixty-one".