74933981 has 2 divisors, whose sum is σ = 74933982. Its totient is φ = 74933980.

The previous prime is 74933899. The next prime is 74934001. The reversal of 74933981 is 18933947.

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., 42055225 + 32878756 = 6485^2 + 5734^2 .

It is an emirp because it is prime and its reverse (18933947) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74933981 is a prime.

It is a super-2 number, since 2×74933981² = 11230203017016722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74933081) 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, 37466990 + 37466991.

It is an arithmetic number, because the mean of its divisors is an integer number (37466991).

Almost surely, 2^74933981 is an apocalyptic number.

It is an amenable number.

74933981 is a deficient number, since it is larger than the sum of its proper divisors (1).

74933981 is an equidigital number, since it uses as much as digits as its factorization.

74933981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 74933981 is about 8656.4415899375. The cubic root of 74933981 is about 421.5925572567.

The spelling of 74933981 in words is "seventy-four million, nine hundred thirty-three thousand, nine hundred eighty-one".