74039281 has 2 divisors, whose sum is σ = 74039282. Its totient is φ = 74039280.

The previous prime is 74039213. The next prime is 74039293. The reversal of 74039281 is 18293047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54538225 + 19501056 = 7385^2 + 4416^2 .

It is a cyclic number.

It is not a de Polignac number, because 74039281 - 2¹¹ = 74037233 is a prime.

It is a super-2 number, since 2×74039281² = 10963630261993922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74039881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37019640 + 37019641.

It is an arithmetic number, because the mean of its divisors is an integer number (37019641).

Almost surely, 2^74039281 is an apocalyptic number.

It is an amenable number.

74039281 is a deficient number, since it is larger than the sum of its proper divisors (1).

74039281 is an equidigital number, since it uses as much as digits as its factorization.

74039281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 74039281 is about 8604.6081258823. The cubic root of 74039281 is about 419.9079182108.

The spelling of 74039281 in words is "seventy-four million, thirty-nine thousand, two hundred eighty-one".