74173609 has 2 divisors, whose sum is σ = 74173610. Its totient is φ = 74173608.

The previous prime is 74173573. The next prime is 74173637. The reversal of 74173609 is 90637147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69355584 + 4818025 = 8328^2 + 2195^2 .

It is a cyclic number.

It is not a de Polignac number, because 74173609 - 2¹⁵ = 74140841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74171609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37086804 + 37086805.

It is an arithmetic number, because the mean of its divisors is an integer number (37086805).

Almost surely, 2^74173609 is an apocalyptic number.

It is an amenable number.

74173609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74173609 is an equidigital number, since it uses as much as digits as its factorization.

74173609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 74173609 is about 8612.4101736970. The cubic root of 74173609 is about 420.1617083282.

It can be divided in two parts, 7417 and 3609, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 74173609 in words is "seventy-four million, one hundred seventy-three thousand, six hundred nine".