74789569 has 2 divisors, whose sum is σ = 74789570. Its totient is φ = 74789568.

The previous prime is 74789563. The next prime is 74789581. The reversal of 74789569 is 96598747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70358544 + 4431025 = 8388^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 74789569 - 2⁷ = 74789441 is a prime.

It is a super-2 number, since 2×74789569² = 11186959262411522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74789563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37394784 + 37394785.

It is an arithmetic number, because the mean of its divisors is an integer number (37394785).

Almost surely, 2^74789569 is an apocalyptic number.

It is an amenable number.

74789569 is a deficient number, since it is larger than the sum of its proper divisors (1).

74789569 is an equidigital number, since it uses as much as digits as its factorization.

74789569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The square root of 74789569 is about 8648.0962644966. The cubic root of 74789569 is about 421.3215534720.

The spelling of 74789569 in words is "seventy-four million, seven hundred eighty-nine thousand, five hundred sixty-nine".