99715397 has 2 divisors, whose sum is σ = 99715398. Its totient is φ = 99715396.

The previous prime is 99715367. The next prime is 99715457. The reversal of 99715397 is 79351799.

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., 72352036 + 27363361 = 8506^2 + 5231^2 .

It is an emirp because it is prime and its reverse (79351799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99715397 - 2⁸ = 99715141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99715307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49857698 + 49857699.

It is an arithmetic number, because the mean of its divisors is an integer number (49857699).

Almost surely, 2^99715397 is an apocalyptic number.

It is an amenable number.

99715397 is a deficient number, since it is larger than the sum of its proper divisors (1).

99715397 is an equidigital number, since it uses as much as digits as its factorization.

99715397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 535815, while the sum is 50.

The square root of 99715397 is about 9985.7597107080. The cubic root of 99715397 is about 463.7181282601.

The spelling of 99715397 in words is "ninety-nine million, seven hundred fifteen thousand, three hundred ninety-seven".