73412281 has 2 divisors, whose sum is σ = 73412282. Its totient is φ = 73412280.

The previous prime is 73412249. The next prime is 73412321. The reversal of 73412281 is 18221437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59536656 + 13875625 = 7716^2 + 3725^2 .

It is a cyclic number.

It is not a de Polignac number, because 73412281 - 2⁵ = 73412249 is a prime.

It is a super-2 number, since 2×73412281² = 10778726003245922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73412201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36706140 + 36706141.

It is an arithmetic number, because the mean of its divisors is an integer number (36706141).

Almost surely, 2^73412281 is an apocalyptic number.

It is an amenable number.

73412281 is a deficient number, since it is larger than the sum of its proper divisors (1).

73412281 is an equidigital number, since it uses as much as digits as its factorization.

73412281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 73412281 is about 8568.0966964665. The cubic root of 73412281 is about 418.7192294610.

The spelling of 73412281 in words is "seventy-three million, four hundred twelve thousand, two hundred eighty-one".