1318693823 has 2 divisors, whose sum is σ = 1318693824. Its totient is φ = 1318693822.

The previous prime is 1318693819. The next prime is 1318693867. The reversal of 1318693823 is 3283968131.

It is an a-pointer prime, because the next prime (1318693867) can be obtained adding 1318693823 to its sum of digits (44).

It is a weak prime.

It is an emirp because it is prime and its reverse (3283968131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318693823 - 2² = 1318693819 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318696823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659346911 + 659346912.

It is an arithmetic number, because the mean of its divisors is an integer number (659346912).

Almost surely, 2^1318693823 is an apocalyptic number.

1318693823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318693823 is an equidigital number, since it uses as much as digits as its factorization.

1318693823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 1318693823 is about 36313.8241307632. The cubic root of 1318693823 is about 1096.5993664207.

The spelling of 1318693823 in words is "one billion, three hundred eighteen million, six hundred ninety-three thousand, eight hundred twenty-three".