1317250723 has 2 divisors, whose sum is σ = 1317250724. Its totient is φ = 1317250722.

The previous prime is 1317250699. The next prime is 1317250783. The reversal of 1317250723 is 3270527131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317250723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317250783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658625361 + 658625362.

It is an arithmetic number, because the mean of its divisors is an integer number (658625362).

Almost surely, 2^1317250723 is an apocalyptic number.

1317250723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317250723 is an equidigital number, since it uses as much as digits as its factorization.

1317250723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 1317250723 is about 36293.9488482584. The cubic root of 1317250723 is about 1096.1992027297.

Adding to 1317250723 its reverse (3270527131), we get a palindrome (4587777854).

The spelling of 1317250723 in words is "one billion, three hundred seventeen million, two hundred fifty thousand, seven hundred twenty-three".