1318936319 has 4 divisors (see below), whose sum is σ = 1388354040. Its totient is φ = 1249518600.

The previous prime is 1318936309. The next prime is 1318936337. The reversal of 1318936319 is 9136398131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9136398131 = 7 ⋅1305199733.

It is a cyclic number.

It is not a de Polignac number, because 1318936319 - 2²⁰ = 1317887743 is a prime.

It is a super-2 number, since 2×1318936319² = 3479186027154539522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1318936319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318936309) 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, 34708832 + ... + 34708869.

It is an arithmetic number, because the mean of its divisors is an integer number (347088510).

Almost surely, 2^1318936319 is an apocalyptic number.

1318936319 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1318936319 is a deficient number, since it is larger than the sum of its proper divisors (69417721).

1318936319 is an equidigital number, since it uses as much as digits as its factorization.

1318936319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69417720.

The product of its digits is 104976, while the sum is 44.

The square root of 1318936319 is about 36317.1628710173. The cubic root of 1318936319 is about 1096.6665805728. Note that the first 3 decimals are identical.

The spelling of 1318936319 in words is "one billion, three hundred eighteen million, nine hundred thirty-six thousand, three hundred nineteen".