74299681 has 2 divisors, whose sum is σ = 74299682. Its totient is φ = 74299680.

The previous prime is 74299661. The next prime is 74299697. The reversal of 74299681 is 18699247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 9979281 = 8020^2 + 3159^2 .

It is a cyclic number.

It is not a de Polignac number, because 74299681 - 2⁵ = 74299649 is a prime.

It is a super-2 number, since 2×74299681² = 11040885193403522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74299601) 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, 37149840 + 37149841.

It is an arithmetic number, because the mean of its divisors is an integer number (37149841).

Almost surely, 2^74299681 is an apocalyptic number.

It is an amenable number.

74299681 is a deficient number, since it is larger than the sum of its proper divisors (1).

74299681 is an equidigital number, since it uses as much as digits as its factorization.

74299681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 74299681 is about 8619.7262717560. The cubic root of 74299681 is about 420.3996215372.

The spelling of 74299681 in words is "seventy-four million, two hundred ninety-nine thousand, six hundred eighty-one".