11865172393 has 2 divisors, whose sum is σ = 11865172394. Its totient is φ = 11865172392.

The previous prime is 11865172379. The next prime is 11865172427. The reversal of 11865172393 is 39327156811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11451782169 + 413390224 = 107013^2 + 20332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11865172393 is a prime.

It is not a weakly prime, because it can be changed into another prime (11865172093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932586196 + 5932586197.

It is an arithmetic number, because the mean of its divisors is an integer number (5932586197).

Almost surely, 2^11865172393 is an apocalyptic number.

It is an amenable number.

11865172393 is a deficient number, since it is larger than the sum of its proper divisors (1).

11865172393 is an equidigital number, since it uses as much as digits as its factorization.

11865172393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The spelling of 11865172393 in words is "eleven billion, eight hundred sixty-five million, one hundred seventy-two thousand, three hundred ninety-three".