1318764049 has 2 divisors, whose sum is σ = 1318764050. Its totient is φ = 1318764048.

The previous prime is 1318764017. The next prime is 1318764059. The reversal of 1318764049 is 9404678131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 805424400 + 513339649 = 28380^2 + 22657^2 .

It is an emirp because it is prime and its reverse (9404678131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318764049 - 2⁵ = 1318764017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1318763996 and 1318764014.

It is not a weakly prime, because it can be changed into another prime (1318764059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659382024 + 659382025.

It is an arithmetic number, because the mean of its divisors is an integer number (659382025).

Almost surely, 2^1318764049 is an apocalyptic number.

It is an amenable number.

1318764049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318764049 is an equidigital number, since it uses as much as digits as its factorization.

1318764049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1318764049 is about 36314.7910499290. The cubic root of 1318764049 is about 1096.6188322534.

The spelling of 1318764049 in words is "one billion, three hundred eighteen million, seven hundred sixty-four thousand, forty-nine".