1208972517449 has 2 divisors, whose sum is σ = 1208972517450. Its totient is φ = 1208972517448.

The previous prime is 1208972517427. The next prime is 1208972517461. The reversal of 1208972517449 is 9447152798021.

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., 1070024736400 + 138947781049 = 1034420^2 + 372757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1208972517449 is a prime.

It is a super-2 number, since 2×1208972517449² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1208972517409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604486258724 + 604486258725.

It is an arithmetic number, because the mean of its divisors is an integer number (604486258725).

Almost surely, 2^{1208972517449} is an apocalyptic number.

It is an amenable number.

1208972517449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208972517449 is an equidigital number, since it uses as much as digits as its factorization.

1208972517449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 1208972517449 in words is "one trillion, two hundred eight billion, nine hundred seventy-two million, five hundred seventeen thousand, four hundred forty-nine".