99909739 has 2 divisors, whose sum is σ = 99909740. Its totient is φ = 99909738.

The previous prime is 99909721. The next prime is 99909767. The reversal of 99909739 is 93790999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99909739 - 2²⁵ = 66355307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99909739.

It is not a weakly prime, because it can be changed into another prime (99909779) 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, 49954869 + 49954870.

It is an arithmetic number, because the mean of its divisors is an integer number (49954870).

Almost surely, 2^99909739 is an apocalyptic number.

99909739 is a deficient number, since it is larger than the sum of its proper divisors (1).

99909739 is an equidigital number, since it uses as much as digits as its factorization.

99909739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 99909739 is about 9995.4859311591. The cubic root of 99909739 is about 464.0191898400.

The spelling of 99909739 in words is "ninety-nine million, nine hundred nine thousand, seven hundred thirty-nine".