99715289 has 2 divisors, whose sum is σ = 99715290. Its totient is φ = 99715288.

The previous prime is 99715283. The next prime is 99715303. The reversal of 99715289 is 98251799.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60715264 + 39000025 = 7792^2 + 6245^2 .

It is an emirp because it is prime and its reverse (98251799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99715289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99715283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49857644 + 49857645.

It is an arithmetic number, because the mean of its divisors is an integer number (49857645).

Almost surely, 2^99715289 is an apocalyptic number.

It is an amenable number.

99715289 is a deficient number, since it is larger than the sum of its proper divisors (1).

99715289 is an equidigital number, since it uses as much as digits as its factorization.

99715289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 50.

The square root of 99715289 is about 9985.7543030059. The cubic root of 99715289 is about 463.7179608450.

The spelling of 99715289 in words is "ninety-nine million, seven hundred fifteen thousand, two hundred eighty-nine".