99397939 has 2 divisors, whose sum is σ = 99397940. Its totient is φ = 99397938.

The previous prime is 99397933. The next prime is 99397951. The reversal of 99397939 is 93979399.

It is a weak prime.

It is an emirp because it is prime and its reverse (93979399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99397939 - 2³ = 99397931 is a prime.

It is not a weakly prime, because it can be changed into another prime (99397931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49698969 + 49698970.

It is an arithmetic number, because the mean of its divisors is an integer number (49698970).

Almost surely, 2^99397939 is an apocalyptic number.

99397939 is a deficient number, since it is larger than the sum of its proper divisors (1).

99397939 is an equidigital number, since it uses as much as digits as its factorization.

99397939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3720087, while the sum is 58.

The square root of 99397939 is about 9969.8515034077. The cubic root of 99397939 is about 463.2255011325.

The spelling of 99397939 in words is "ninety-nine million, three hundred ninety-seven thousand, nine hundred thirty-nine".