1318730459 has 2 divisors, whose sum is σ = 1318730460. Its totient is φ = 1318730458.

The previous prime is 1318730447. The next prime is 1318730467. The reversal of 1318730459 is 9540378131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318730459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1318730059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659365229 + 659365230.

It is an arithmetic number, because the mean of its divisors is an integer number (659365230).

Almost surely, 2^1318730459 is an apocalyptic number.

1318730459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318730459 is an equidigital number, since it uses as much as digits as its factorization.

1318730459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1318730459 is about 36314.3285632545. The cubic root of 1318730459 is about 1096.6095215812.

The spelling of 1318730459 in words is "one billion, three hundred eighteen million, seven hundred thirty thousand, four hundred fifty-nine".