1318287617 has 8 divisors (see below), whose sum is σ = 1368337152. Its totient is φ = 1268708400.

The previous prime is 1318287571. The next prime is 1318287643. The reversal of 1318287617 is 7167828131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1318287617 - 2¹⁴ = 1318271233 is a prime.

It is a super-2 number, since 2×1318287617² = 3475764482271077378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318287517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111863 + ... + 123084.

It is an arithmetic number, because the mean of its divisors is an integer number (171042144).

Almost surely, 2^1318287617 is an apocalyptic number.

It is an amenable number.

1318287617 is a deficient number, since it is larger than the sum of its proper divisors (50049535).

1318287617 is a wasteful number, since it uses less digits than its factorization.

1318287617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235159.

The product of its digits is 112896, while the sum is 44.

The square root of 1318287617 is about 36308.2307059983. The cubic root of 1318287617 is about 1096.4867572666.

The spelling of 1318287617 in words is "one billion, three hundred eighteen million, two hundred eighty-seven thousand, six hundred seventeen".