1319298749 has 2 divisors, whose sum is σ = 1319298750. Its totient is φ = 1319298748.

The previous prime is 1319298727. The next prime is 1319298767. The reversal of 1319298749 is 9478929131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 998244025 + 321054724 = 31595^2 + 17918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319298749 - 2²⁰ = 1318250173 is a prime.

It is a super-2 number, since 2×1319298749² = 3481098378225930002, 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 1319298749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1319298049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659649374 + 659649375.

It is an arithmetic number, because the mean of its divisors is an integer number (659649375).

Almost surely, 2^1319298749 is an apocalyptic number.

It is an amenable number.

1319298749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319298749 is an equidigital number, since it uses as much as digits as its factorization.

1319298749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 1319298749 is about 36322.1523178349. The cubic root of 1319298749 is about 1096.7670222348.

The spelling of 1319298749 in words is "one billion, three hundred nineteen million, two hundred ninety-eight thousand, seven hundred forty-nine".