1299423454837 has 2 divisors, whose sum is σ = 1299423454838. Its totient is φ = 1299423454836.

The previous prime is 1299423454811. The next prime is 1299423454843. The reversal of 1299423454837 is 7384543249921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815266332241 + 484157122596 = 902921^2 + 695814^2 .

It is an emirp because it is prime and its reverse (7384543249921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299423454837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299423154837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649711727418 + 649711727419.

It is an arithmetic number, because the mean of its divisors is an integer number (649711727419).

Almost surely, 2^{1299423454837} is an apocalyptic number.

It is an amenable number.

1299423454837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299423454837 is an equidigital number, since it uses as much as digits as its factorization.

1299423454837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 61.

The spelling of 1299423454837 in words is "one trillion, two hundred ninety-nine billion, four hundred twenty-three million, four hundred fifty-four thousand, eight hundred thirty-seven".