74147321 has 2 divisors, whose sum is σ = 74147322. Its totient is φ = 74147320.

The previous prime is 74147273. The next prime is 74147347. The reversal of 74147321 is 12374147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57214096 + 16933225 = 7564^2 + 4115^2 .

It is a cyclic number.

It is not a de Polignac number, because 74147321 - 2¹⁰ = 74146297 is a prime.

It is a super-2 number, since 2×74147321² = 10995650422954082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74147221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37073660 + 37073661.

It is an arithmetic number, because the mean of its divisors is an integer number (37073661).

Almost surely, 2^74147321 is an apocalyptic number.

It is an amenable number.

74147321 is a deficient number, since it is larger than the sum of its proper divisors (1).

74147321 is an equidigital number, since it uses as much as digits as its factorization.

74147321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 29.

The square root of 74147321 is about 8610.8838686862. The cubic root of 74147321 is about 420.1120657116.

The spelling of 74147321 in words is "seventy-four million, one hundred forty-seven thousand, three hundred twenty-one".