11913985297 has 2 divisors, whose sum is σ = 11913985298. Its totient is φ = 11913985296.

The previous prime is 11913985241. The next prime is 11913985301. The reversal of 11913985297 is 79258931911.

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., 11864437776 + 49547521 = 108924^2 + 7039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11913985297 is a prime.

It is not a weakly prime, because it can be changed into another prime (11913985217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5956992648 + 5956992649.

It is an arithmetic number, because the mean of its divisors is an integer number (5956992649).

Almost surely, 2^11913985297 is an apocalyptic number.

It is an amenable number.

11913985297 is a deficient number, since it is larger than the sum of its proper divisors (1).

11913985297 is an equidigital number, since it uses as much as digits as its factorization.

11913985297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 55.

The spelling of 11913985297 in words is "eleven billion, nine hundred thirteen million, nine hundred eighty-five thousand, two hundred ninety-seven".