99955589 has 2 divisors, whose sum is σ = 99955590. Its totient is φ = 99955588.

The previous prime is 99955579. The next prime is 99955601. The reversal of 99955589 is 98555999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93412225 + 6543364 = 9665^2 + 2558^2 .

It is an emirp because it is prime and its reverse (98555999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99955589 - 2⁴ = 99955573 is a prime.

It is a super-2 number, since 2×99955589² = 19982239544673842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99955519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49977794 + 49977795.

It is an arithmetic number, because the mean of its divisors is an integer number (49977795).

Almost surely, 2^99955589 is an apocalyptic number.

It is an amenable number.

99955589 is a deficient number, since it is larger than the sum of its proper divisors (1).

99955589 is an equidigital number, since it uses as much as digits as its factorization.

99955589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6561000, while the sum is 59.

The square root of 99955589 is about 9997.7792034031. The cubic root of 99955589 is about 464.0901606529.

The spelling of 99955589 in words is "ninety-nine million, nine hundred fifty-five thousand, five hundred eighty-nine".