1318042693 has 32 divisors (see below), whose sum is σ = 1497000960. Its totient is φ = 1150364160.

The previous prime is 1318042633. The next prime is 1318042709. The reversal of 1318042693 is 3962408131.

It is a de Polignac number, because none of the positive numbers 2^k-1318042693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318042603) 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 31 ways as a sum of consecutive naturals, for example, 7363278 + ... + 7363456.

It is an arithmetic number, because the mean of its divisors is an integer number (46781280).

Almost surely, 2^1318042693 is an apocalyptic number.

It is an amenable number.

1318042693 is a deficient number, since it is larger than the sum of its proper divisors (178958267).

1318042693 is a wasteful number, since it uses less digits than its factorization.

1318042693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1318042693 is about 36304.8577052713. The cubic root of 1318042693 is about 1096.4188478179.

The spelling of 1318042693 in words is "one billion, three hundred eighteen million, forty-two thousand, six hundred ninety-three".