74474789 has 2 divisors, whose sum is σ = 74474790. Its totient is φ = 74474788.

The previous prime is 74474783. The next prime is 74474791. The reversal of 74474789 is 98747447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48413764 + 26061025 = 6958^2 + 5105^2 .

It is an emirp because it is prime and its reverse (98747447) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74474789 is a prime.

Together with 74474791, 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 (74474783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37237394 + 37237395.

It is an arithmetic number, because the mean of its divisors is an integer number (37237395).

Almost surely, 2^74474789 is an apocalyptic number.

It is an amenable number.

74474789 is a deficient number, since it is larger than the sum of its proper divisors (1).

74474789 is an equidigital number, since it uses as much as digits as its factorization.

74474789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 50.

The square root of 74474789 is about 8629.8776932237. The cubic root of 74474789 is about 420.7296255598.

The spelling of 74474789 in words is "seventy-four million, four hundred seventy-four thousand, seven hundred eighty-nine".