99874139 has 2 divisors, whose sum is σ = 99874140. Its totient is φ = 99874138.

The previous prime is 99874129. The next prime is 99874169. The reversal of 99874139 is 93147899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99874139 - 2⁴ = 99874123 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (99874129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49937069 + 49937070.

It is an arithmetic number, because the mean of its divisors is an integer number (49937070).

Almost surely, 2^99874139 is an apocalyptic number.

99874139 is a deficient number, since it is larger than the sum of its proper divisors (1).

99874139 is an equidigital number, since it uses as much as digits as its factorization.

99874139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 99874139 is about 9993.7049686290. The cubic root of 99874139 is about 463.9640699363.

The spelling of 99874139 in words is "ninety-nine million, eight hundred seventy-four thousand, one hundred thirty-nine".