1264317493 has 2 divisors, whose sum is σ = 1264317494. Its totient is φ = 1264317492.

The previous prime is 1264317479. The next prime is 1264317511. The reversal of 1264317493 is 3947134621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1216126129 + 48191364 = 34873^2 + 6942^2 .

It is an emirp because it is prime and its reverse (3947134621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264317493 - 2²¹ = 1262220341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264317193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632158746 + 632158747.

It is an arithmetic number, because the mean of its divisors is an integer number (632158747).

Almost surely, 2^1264317493 is an apocalyptic number.

It is an amenable number.

1264317493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264317493 is an equidigital number, since it uses as much as digits as its factorization.

1264317493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 1264317493 is about 35557.2424830723. The cubic root of 1264317493 is about 1081.3145552779.

The spelling of 1264317493 in words is "one billion, two hundred sixty-four million, three hundred seventeen thousand, four hundred ninety-three".