99999000869 has 2 divisors, whose sum is σ = 99999000870. Its totient is φ = 99999000868.

The previous prime is 99999000811. The next prime is 99999000883. The reversal of 99999000869 is 96800099999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65379933025 + 34619067844 = 255695^2 + 186062^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999000869 - 2²⁰ = 99997952293 is a prime.

It is a super-2 number, since 2×99999000869² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99999000799 and 99999000808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999000469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999500434 + 49999500435.

It is an arithmetic number, because the mean of its divisors is an integer number (49999500435).

Almost surely, 2^99999000869 is an apocalyptic number.

It is an amenable number.

99999000869 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999000869 is an equidigital number, since it uses as much as digits as its factorization.

99999000869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25509168, while the sum is 68.

The spelling of 99999000869 in words is "ninety-nine billion, nine hundred ninety-nine million, eight hundred sixty-nine", and thus it is an aban number.