74193409 has 2 divisors, whose sum is σ = 74193410. Its totient is φ = 74193408.

The previous prime is 74193407. The next prime is 74193467. The reversal of 74193409 is 90439147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54346384 + 19847025 = 7372^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 74193409 - 2¹ = 74193407 is a prime.

Together with 74193407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74193407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37096704 + 37096705.

It is an arithmetic number, because the mean of its divisors is an integer number (37096705).

Almost surely, 2^74193409 is an apocalyptic number.

It is an amenable number.

74193409 is a deficient number, since it is larger than the sum of its proper divisors (1).

74193409 is an equidigital number, since it uses as much as digits as its factorization.

74193409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 74193409 is about 8613.5596010012. The cubic root of 74193409 is about 420.1990911737.

The spelling of 74193409 in words is "seventy-four million, one hundred ninety-three thousand, four hundred nine".