74420981 has 2 divisors, whose sum is σ = 74420982. Its totient is φ = 74420980.

The previous prime is 74420971. The next prime is 74421101. The reversal of 74420981 is 18902447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69989956 + 4431025 = 8366^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 74420981 - 2¹⁰ = 74419957 is a prime.

It is a super-2 number, since 2×74420981² = 11076964826004722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74420971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37210490 + 37210491.

It is an arithmetic number, because the mean of its divisors is an integer number (37210491).

Almost surely, 2^74420981 is an apocalyptic number.

It is an amenable number.

74420981 is a deficient number, since it is larger than the sum of its proper divisors (1).

74420981 is an equidigital number, since it uses as much as digits as its factorization.

74420981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 74420981 is about 8626.7595886289. The cubic root of 74420981 is about 420.6282754952.

The spelling of 74420981 in words is "seventy-four million, four hundred twenty thousand, nine hundred eighty-one".