1317695157 has 12 divisors (see below), whose sum is σ = 1905145164. Its totient is φ = 877629120.

The previous prime is 1317695101. The next prime is 1317695173. The reversal of 1317695157 is 7515967131.

It can be written as a sum of positive squares in 2 ways, for example, as 313502436 + 1004192721 = 17706^2 + 31689^2 .

It is not a de Polignac number, because 1317695157 - 2⁸ = 1317694901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317695957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59448 + ... + 78545.

It is an arithmetic number, because the mean of its divisors is an integer number (158762097).

Almost surely, 2^1317695157 is an apocalyptic number.

It is an amenable number.

1317695157 is a deficient number, since it is larger than the sum of its proper divisors (587450007).

1317695157 is a wasteful number, since it uses less digits than its factorization.

1317695157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139060 (or 139057 counting only the distinct ones).

The product of its digits is 198450, while the sum is 45.

The square root of 1317695157 is about 36300.0710329884. The cubic root of 1317695157 is about 1096.3224729639.

The spelling of 1317695157 in words is "one billion, three hundred seventeen million, six hundred ninety-five thousand, one hundred fifty-seven".