74363281 has 2 divisors, whose sum is σ = 74363282. Its totient is φ = 74363280.

The previous prime is 74363273. The next prime is 74363291. The reversal of 74363281 is 18236347.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44289025 + 30074256 = 6655^2 + 5484^2 .

It is an emirp because it is prime and its reverse (18236347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74363281 - 2³ = 74363273 is a prime.

It is a super-2 number, since 2×74363281² = 11059795122169922, which contains 22 as substring.

It is equal to p_4359184 and since 74363281 and 4359184 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (74363231) 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, 37181640 + 37181641.

It is an arithmetic number, because the mean of its divisors is an integer number (37181641).

Almost surely, 2^74363281 is an apocalyptic number.

It is an amenable number.

74363281 is a deficient number, since it is larger than the sum of its proper divisors (1).

74363281 is an equidigital number, since it uses as much as digits as its factorization.

74363281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 74363281 is about 8623.4146948874. The cubic root of 74363281 is about 420.5195403587.

The spelling of 74363281 in words is "seventy-four million, three hundred sixty-three thousand, two hundred eighty-one".