74835809 has 2 divisors, whose sum is σ = 74835810. Its totient is φ = 74835808.

The previous prime is 74835799. The next prime is 74835833. The reversal of 74835809 is 90853847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63760225 + 11075584 = 7985^2 + 3328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74835809 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74835809.

It is not a weakly prime, because it can be changed into another prime (74835869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37417904 + 37417905.

It is an arithmetic number, because the mean of its divisors is an integer number (37417905).

Almost surely, 2^74835809 is an apocalyptic number.

It is an amenable number.

74835809 is a deficient number, since it is larger than the sum of its proper divisors (1).

74835809 is an equidigital number, since it uses as much as digits as its factorization.

74835809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 74835809 is about 8650.7692721515. The cubic root of 74835809 is about 421.4083654667.

The spelling of 74835809 in words is "seventy-four million, eight hundred thirty-five thousand, eight hundred nine".