99868729 has 2 divisors, whose sum is σ = 99868730. Its totient is φ = 99868728.

The previous prime is 99868723. The next prime is 99868733. The reversal of 99868729 is 92786899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68508729 + 31360000 = 8277^2 + 5600^2 .

It is a cyclic number.

It is not a de Polignac number, because 99868729 - 2²³ = 91480121 is a prime.

It is not a weakly prime, because it can be changed into another prime (99868723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49934364 + 49934365.

It is an arithmetic number, because the mean of its divisors is an integer number (49934365).

Almost surely, 2^99868729 is an apocalyptic number.

It is an amenable number.

99868729 is a deficient number, since it is larger than the sum of its proper divisors (1).

99868729 is an equidigital number, since it uses as much as digits as its factorization.

99868729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 58.

The square root of 99868729 is about 9993.4342945756. The cubic root of 99868729 is about 463.9556924225.

The spelling of 99868729 in words is "ninety-nine million, eight hundred sixty-eight thousand, seven hundred twenty-nine".