99708839 has 2 divisors, whose sum is σ = 99708840. Its totient is φ = 99708838.

The previous prime is 99708809. The next prime is 99708871. The reversal of 99708839 is 93880799.

It is a weak prime.

It is an emirp because it is prime and its reverse (93880799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99708839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99708809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49854419 + 49854420.

It is an arithmetic number, because the mean of its divisors is an integer number (49854420).

Almost surely, 2^99708839 is an apocalyptic number.

99708839 is a deficient number, since it is larger than the sum of its proper divisors (1).

99708839 is an equidigital number, since it uses as much as digits as its factorization.

99708839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 99708839 is about 9985.4313377039. The cubic root of 99708839 is about 463.7079622267.

The spelling of 99708839 in words is "ninety-nine million, seven hundred eight thousand, eight hundred thirty-nine".