1318471919 has 2 divisors, whose sum is σ = 1318471920. Its totient is φ = 1318471918.

The previous prime is 1318471897. The next prime is 1318471927. The reversal of 1318471919 is 9191748131.

It is a strong prime.

It is an emirp because it is prime and its reverse (9191748131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318471919 - 2¹² = 1318467823 is a prime.

It is a super-2 number, since 2×1318471919² = 3476736402383085122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1318471919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318471939) 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 as a sum of consecutive naturals, namely, 659235959 + 659235960.

It is an arithmetic number, because the mean of its divisors is an integer number (659235960).

Almost surely, 2^1318471919 is an apocalyptic number.

1318471919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318471919 is an equidigital number, since it uses as much as digits as its factorization.

1318471919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 44.

The square root of 1318471919 is about 36310.7686368658. The cubic root of 1318471919 is about 1096.5378526631.

The spelling of 1318471919 in words is "one billion, three hundred eighteen million, four hundred seventy-one thousand, nine hundred nineteen".