9911612287 has 2 divisors, whose sum is σ = 9911612288. Its totient is φ = 9911612286.

The previous prime is 9911612233. The next prime is 9911612317. The reversal of 9911612287 is 7822161199.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9911612287 - 2¹⁹ = 9911087999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9911610287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4955806143 + 4955806144.

It is an arithmetic number, because the mean of its divisors is an integer number (4955806144).

Almost surely, 2^9911612287 is an apocalyptic number.

9911612287 is a deficient number, since it is larger than the sum of its proper divisors (1).

9911612287 is an equidigital number, since it uses as much as digits as its factorization.

9911612287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 9911612287 is about 99557.0805467898. The cubic root of 9911612287 is about 2148.0683777318.

The spelling of 9911612287 in words is "nine billion, nine hundred eleven million, six hundred twelve thousand, two hundred eighty-seven".