74643321 has 16 divisors (see below), whose sum is σ = 102314880. Its totient is φ = 48385920.

The previous prime is 74643299. The next prime is 74643367. The reversal of 74643321 is 12334647.

It is not a de Polignac number, because 74643321 - 2¹⁹ = 74119033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74643391) 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 15 ways as a sum of consecutive naturals, for example, 13996 + ... + 18578.

It is an arithmetic number, because the mean of its divisors is an integer number (6394680).

Almost surely, 2^74643321 is an apocalyptic number.

It is an amenable number.

74643321 is a deficient number, since it is larger than the sum of its proper divisors (27671559).

74643321 is a wasteful number, since it uses less digits than its factorization.

74643321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736.

The product of its digits is 12096, while the sum is 30.

The square root of 74643321 is about 8639.6366243031. The cubic root of 74643321 is about 421.0467484756.

Adding to 74643321 its reverse (12334647), we get a palindrome (86977968).

The spelling of 74643321 in words is "seventy-four million, six hundred forty-three thousand, three hundred twenty-one".