74913281 has 2 divisors, whose sum is σ = 74913282. Its totient is φ = 74913280.

The previous prime is 74913263. The next prime is 74913283. The reversal of 74913281 is 18231947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 28890625 = 6784^2 + 5375^2 .

It is a cyclic number.

It is not a de Polignac number, because 74913281 - 2⁶ = 74913217 is a prime.

It is a super-4 number, since 4×74913281⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 74913283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74913283) 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, 37456640 + 37456641.

It is an arithmetic number, because the mean of its divisors is an integer number (37456641).

Almost surely, 2^74913281 is an apocalyptic number.

It is an amenable number.

74913281 is a deficient number, since it is larger than the sum of its proper divisors (1).

74913281 is an equidigital number, since it uses as much as digits as its factorization.

74913281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 74913281 is about 8655.2458659474. The cubic root of 74913281 is about 421.5537329942.

The spelling of 74913281 in words is "seventy-four million, nine hundred thirteen thousand, two hundred eighty-one".