99749539 has 2 divisors, whose sum is σ = 99749540. Its totient is φ = 99749538.

The previous prime is 99749513. The next prime is 99749567. The reversal of 99749539 is 93594799.

It is a weak prime.

It is an emirp because it is prime and its reverse (93594799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99749539 - 2¹³ = 99741347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99749539.

It is not a weakly prime, because it can be changed into another prime (99749569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49874769 + 49874770.

It is an arithmetic number, because the mean of its divisors is an integer number (49874770).

Almost surely, 2^99749539 is an apocalyptic number.

99749539 is a deficient number, since it is larger than the sum of its proper divisors (1).

99749539 is an equidigital number, since it uses as much as digits as its factorization.

99749539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 55.

The square root of 99749539 is about 9987.4690988258. The cubic root of 99749539 is about 463.7710470610.

The spelling of 99749539 in words is "ninety-nine million, seven hundred forty-nine thousand, five hundred thirty-nine".