1299916573 has 2 divisors, whose sum is σ = 1299916574. Its totient is φ = 1299916572.

The previous prime is 1299916549. The next prime is 1299916589. The reversal of 1299916573 is 3756199921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1220314489 + 79602084 = 34933^2 + 8922^2 .

It is an emirp because it is prime and its reverse (3756199921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1299916573 - 2⁹ = 1299916061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1299916573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299916073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649958286 + 649958287.

It is an arithmetic number, because the mean of its divisors is an integer number (649958287).

Almost surely, 2^1299916573 is an apocalyptic number.

It is an amenable number.

1299916573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299916573 is an equidigital number, since it uses as much as digits as its factorization.

1299916573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 52.

The square root of 1299916573 is about 36054.3558117462. The cubic root of 1299916573 is about 1091.3695359888.

The spelling of 1299916573 in words is "one billion, two hundred ninety-nine million, nine hundred sixteen thousand, five hundred seventy-three".