74369221 has 8 divisors (see below), whose sum is σ = 75309080. Its totient is φ = 73433088.

The previous prime is 74369219. The next prime is 74369233. The reversal of 74369221 is 12296347.

It can be written as a sum of positive squares in 4 ways, for example, as 17969121 + 56400100 = 4239^2 + 7510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74369221 - 2¹ = 74369219 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 (74369291) 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 in 7 ways as a sum of consecutive naturals, for example, 74095 + ... + 75091.

It is an arithmetic number, because the mean of its divisors is an integer number (9413635).

Almost surely, 2^74369221 is an apocalyptic number.

It is an amenable number.

74369221 is a deficient number, since it is larger than the sum of its proper divisors (939859).

74369221 is an equidigital number, since it uses as much as digits as its factorization.

74369221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863.

The product of its digits is 18144, while the sum is 34.

The square root of 74369221 is about 8623.7590991400. The cubic root of 74369221 is about 420.5307368324.

The spelling of 74369221 in words is "seventy-four million, three hundred sixty-nine thousand, two hundred twenty-one".