99127217292689 has 2 divisors, whose sum is σ = 99127217292690. Its totient is φ = 99127217292688.

The previous prime is 99127217292679. The next prime is 99127217292731. The reversal of 99127217292689 is 98629271272199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77401988665600 + 21725228627089 = 8797840^2 + 4661033^2 .

It is a cyclic number.

It is not a de Polignac number, because 99127217292689 - 2¹⁶ = 99127217227153 is a prime.

It is a super-2 number, since 2×99127217292689² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99127217292679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49563608646344 + 49563608646345.

It is an arithmetic number, because the mean of its divisors is an integer number (49563608646345).

Almost surely, 2^{99127217292689} is an apocalyptic number.

It is an amenable number.

99127217292689 is a deficient number, since it is larger than the sum of its proper divisors (1).

99127217292689 is an equidigital number, since it uses as much as digits as its factorization.

99127217292689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246903552, while the sum is 74.

The spelling of 99127217292689 in words is "ninety-nine trillion, one hundred twenty-seven billion, two hundred seventeen million, two hundred ninety-two thousand, six hundred eighty-nine".