1974317250817 has 2 divisors, whose sum is σ = 1974317250818. Its totient is φ = 1974317250816.

The previous prime is 1974317250811. The next prime is 1974317250839. The reversal of 1974317250817 is 7180527134791.

It is a Cunningham number, because it is equal to 1405104²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1974317250816 + 1 = 1405104^2 + 1^2 .

It is an emirp because it is prime and its reverse (7180527134791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1974317250817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1974317250811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987158625408 + 987158625409.

It is an arithmetic number, because the mean of its divisors is an integer number (987158625409).

Almost surely, 2^{1974317250817} is an apocalyptic number.

It is an amenable number.

1974317250817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974317250817 is an equidigital number, since it uses as much as digits as its factorization.

1974317250817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 1974317250817 in words is "one trillion, nine hundred seventy-four billion, three hundred seventeen million, two hundred fifty thousand, eight hundred seventeen".