74447321 has 16 divisors (see below), whose sum is σ = 84369600. Its totient is φ = 65206848.

The previous prime is 74447311. The next prime is 74447357. The reversal of 74447321 is 12374447.

It is not a de Polignac number, because 74447321 - 2⁶ = 74447257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74447311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20570 + ... + 23916.

It is an arithmetic number, because the mean of its divisors is an integer number (5273100).

Almost surely, 2^74447321 is an apocalyptic number.

It is an amenable number.

74447321 is a deficient number, since it is larger than the sum of its proper divisors (9922279).

74447321 is a wasteful number, since it uses less digits than its factorization.

74447321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3448.

The product of its digits is 18816, while the sum is 32.

The square root of 74447321 is about 8628.2860986409. The cubic root of 74447321 is about 420.6778943069.

The spelling of 74447321 in words is "seventy-four million, four hundred forty-seven thousand, three hundred twenty-one".