74627221 has 2 divisors, whose sum is σ = 74627222. Its totient is φ = 74627220.

The previous prime is 74627197. The next prime is 74627227. The reversal of 74627221 is 12272647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 2292196 = 8505^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 74627221 - 2⁹ = 74626709 is a prime.

It is a super-2 number, since 2×74627221² = 11138444228365682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74627227) 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 as a sum of consecutive naturals, namely, 37313610 + 37313611.

It is an arithmetic number, because the mean of its divisors is an integer number (37313611).

Almost surely, 2^74627221 is an apocalyptic number.

It is an amenable number.

74627221 is a deficient number, since it is larger than the sum of its proper divisors (1).

74627221 is an equidigital number, since it uses as much as digits as its factorization.

74627221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 31.

The square root of 74627221 is about 8638.7048219047. The cubic root of 74627221 is about 421.0164740988.

Adding to 74627221 its reverse (12272647), we get a palindrome (86899868).

The spelling of 74627221 in words is "seventy-four million, six hundred twenty-seven thousand, two hundred twenty-one".