1317261763 has 4 divisors (see below), whose sum is σ = 1320082920. Its totient is φ = 1314440608.

The previous prime is 1317261749. The next prime is 1317261787. The reversal of 1317261763 is 3671627131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317261763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317261163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409878 + ... + 1410811.

It is an arithmetic number, because the mean of its divisors is an integer number (330020730).

Almost surely, 2^1317261763 is an apocalyptic number.

1317261763 is a deficient number, since it is larger than the sum of its proper divisors (2821157).

1317261763 is an equidigital number, since it uses as much as digits as its factorization.

1317261763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821156.

The product of its digits is 31752, while the sum is 37.

The square root of 1317261763 is about 36294.1009394089. The cubic root of 1317261763 is about 1096.2022651701.

Adding to 1317261763 its reverse (3671627131), we get a palindrome (4988888894).

The spelling of 1317261763 in words is "one billion, three hundred seventeen million, two hundred sixty-one thousand, seven hundred sixty-three".