74473409 has 2 divisors, whose sum is σ = 74473410. Its totient is φ = 74473408.

The previous prime is 74473403. The next prime is 74473411. The reversal of 74473409 is 90437447.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42211009 + 32262400 = 6497^2 + 5680^2 .

It is a cyclic number.

It is not a de Polignac number, because 74473409 - 2⁴ = 74473393 is a prime.

Together with 74473411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74473403) 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, 37236704 + 37236705.

It is an arithmetic number, because the mean of its divisors is an integer number (37236705).

Almost surely, 2^74473409 is an apocalyptic number.

It is an amenable number.

74473409 is a deficient number, since it is larger than the sum of its proper divisors (1).

74473409 is an equidigital number, since it uses as much as digits as its factorization.

74473409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 74473409 is about 8629.7977380701. The cubic root of 74473409 is about 420.7270268706.

The spelling of 74473409 in words is "seventy-four million, four hundred seventy-three thousand, four hundred nine".