99859489 has 2 divisors, whose sum is σ = 99859490. Its totient is φ = 99859488.

The previous prime is 99859483. The next prime is 99859493. The reversal of 99859489 is 98495899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99341089 + 518400 = 9967^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 99859489 - 2³ = 99859481 is a prime.

It is a super-2 number, since 2×99859489² = 19943835086682242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99859481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49929744 + 49929745.

It is an arithmetic number, because the mean of its divisors is an integer number (49929745).

Almost surely, 2^99859489 is an apocalyptic number.

It is an amenable number.

99859489 is a deficient number, since it is larger than the sum of its proper divisors (1).

99859489 is an equidigital number, since it uses as much as digits as its factorization.

99859489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8398080, while the sum is 61.

The square root of 99859489 is about 9992.9719803470. The cubic root of 99859489 is about 463.9413833628.

The spelling of 99859489 in words is "ninety-nine million, eight hundred fifty-nine thousand, four hundred eighty-nine".