74822789 has 2 divisors, whose sum is σ = 74822790. Its totient is φ = 74822788.

The previous prime is 74822777. The next prime is 74822791. The reversal of 74822789 is 98722847.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74822500 + 289 = 8650^2 + 17^2 .

It is an emirp because it is prime and its reverse (98722847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74822789 - 2⁸ = 74822533 is a prime.

Together with 74822791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74822989) 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, 37411394 + 37411395.

It is an arithmetic number, because the mean of its divisors is an integer number (37411395).

Almost surely, 2^74822789 is an apocalyptic number.

It is an amenable number.

74822789 is a deficient number, since it is larger than the sum of its proper divisors (1).

74822789 is an equidigital number, since it uses as much as digits as its factorization.

74822789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 74822789 is about 8650.0167051862. The cubic root of 74822789 is about 421.3839250497.

The spelling of 74822789 in words is "seventy-four million, eight hundred twenty-two thousand, seven hundred eighty-nine".