99859289 has 2 divisors, whose sum is σ = 99859290. Its totient is φ = 99859288.

The previous prime is 99859273. The next prime is 99859297. The reversal of 99859289 is 98295899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92064025 + 7795264 = 9595^2 + 2792^2 .

It is a cyclic number.

It is not a de Polignac number, because 99859289 - 2⁴ = 99859273 is a prime.

It is a super-4 number, since 4×99859289⁴ (a number of 33 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99859229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49929644 + 49929645.

It is an arithmetic number, because the mean of its divisors is an integer number (49929645).

Almost surely, 2^99859289 is an apocalyptic number.

It is an amenable number.

99859289 is a deficient number, since it is larger than the sum of its proper divisors (1).

99859289 is an equidigital number, since it uses as much as digits as its factorization.

99859289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 59.

The square root of 99859289 is about 9992.9619733090. The cubic root of 99859289 is about 463.9410736331.

The spelling of 99859289 in words is "ninety-nine million, eight hundred fifty-nine thousand, two hundred eighty-nine".