74047609 has 2 divisors, whose sum is σ = 74047610. Its totient is φ = 74047608.

The previous prime is 74047577. The next prime is 74047621. The reversal of 74047609 is 90674047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51437584 + 22610025 = 7172^2 + 4755^2 .

It is a cyclic number.

It is not a de Polignac number, because 74047609 - 2⁵ = 74047577 is a prime.

It is not a weakly prime, because it can be changed into another prime (74047639) 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, 37023804 + 37023805.

It is an arithmetic number, because the mean of its divisors is an integer number (37023805).

Almost surely, 2^74047609 is an apocalyptic number.

It is an amenable number.

74047609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74047609 is an equidigital number, since it uses as much as digits as its factorization.

74047609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 74047609 is about 8605.0920390197. The cubic root of 74047609 is about 419.9236614847.

The spelling of 74047609 in words is "seventy-four million, forty-seven thousand, six hundred nine".