99869449 has 2 divisors, whose sum is σ = 99869450. Its totient is φ = 99869448.

The previous prime is 99869447. The next prime is 99869459. The reversal of 99869449 is 94496899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90383049 + 9486400 = 9507^2 + 3080^2 .

It is a cyclic number.

It is not a de Polignac number, because 99869449 - 2¹ = 99869447 is a prime.

Together with 99869447, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 99869393 and 99869402.

It is not a weakly prime, because it can be changed into another prime (99869443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49934724 + 49934725.

It is an arithmetic number, because the mean of its divisors is an integer number (49934725).

Almost surely, 2^99869449 is an apocalyptic number.

It is an amenable number.

99869449 is a deficient number, since it is larger than the sum of its proper divisors (1).

99869449 is an equidigital number, since it uses as much as digits as its factorization.

99869449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 58.

The square root of 99869449 is about 9993.4703181628. The cubic root of 99869449 is about 463.9568073771.

The spelling of 99869449 in words is "ninety-nine million, eight hundred sixty-nine thousand, four hundred forty-nine".