74380447 has 4 divisors (see below), whose sum is σ = 76945320. Its totient is φ = 71815576.

The previous prime is 74380403. The next prime is 74380469. The reversal of 74380447 is 74408347.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74408347 = 13 ⋅5723719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74380447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74380247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282393 + ... + 1282450.

It is an arithmetic number, because the mean of its divisors is an integer number (19236330).

Almost surely, 2^74380447 is an apocalyptic number.

74380447 is a deficient number, since it is larger than the sum of its proper divisors (2564873).

74380447 is a wasteful number, since it uses less digits than its factorization.

74380447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564872.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 74380447 is about 8624.4099508314. The cubic root of 74380447 is about 420.5518954088.

The spelling of 74380447 in words is "seventy-four million, three hundred eighty thousand, four hundred forty-seven".