74684789 has 2 divisors, whose sum is σ = 74684790. Its totient is φ = 74684788.

The previous prime is 74684777. The next prime is 74684809. The reversal of 74684789 is 98748647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74684164 + 625 = 8642^2 + 25^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74684789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74684789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74684719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37342394 + 37342395.

It is an arithmetic number, because the mean of its divisors is an integer number (37342395).

Almost surely, 2^74684789 is an apocalyptic number.

It is an amenable number.

74684789 is a deficient number, since it is larger than the sum of its proper divisors (1).

74684789 is an equidigital number, since it uses as much as digits as its factorization.

74684789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 53.

The square root of 74684789 is about 8642.0361605353. The cubic root of 74684789 is about 421.1247046993.

The spelling of 74684789 in words is "seventy-four million, six hundred eighty-four thousand, seven hundred eighty-nine".