74224681 has 2 divisors, whose sum is σ = 74224682. Its totient is φ = 74224680.

The previous prime is 74224663. The next prime is 74224693. The reversal of 74224681 is 18642247.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50126400 + 24098281 = 7080^2 + 4909^2 .

It is a cyclic number.

It is not a de Polignac number, because 74224681 - 2¹⁷ = 74093609 is a prime.

It is a super-2 number, since 2×74224681² = 11018606539103522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74224481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37112340 + 37112341.

It is an arithmetic number, because the mean of its divisors is an integer number (37112341).

Almost surely, 2^74224681 is an apocalyptic number.

It is an amenable number.

74224681 is a deficient number, since it is larger than the sum of its proper divisors (1).

74224681 is an equidigital number, since it uses as much as digits as its factorization.

74224681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 74224681 is about 8615.3746871509. The cubic root of 74224681 is about 420.2581198681.

The spelling of 74224681 in words is "seventy-four million, two hundred twenty-four thousand, six hundred eighty-one".