73017281 has 2 divisors, whose sum is σ = 73017282. Its totient is φ = 73017280.

The previous prime is 73017271. The next prime is 73017283. The reversal of 73017281 is 18271037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73017025 + 256 = 8545^2 + 16^2 .

It is an emirp because it is prime and its reverse (18271037) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73017281 is a prime.

It is a super-2 number, since 2×73017281² = 10663046649265922, which contains 22 as substring.

Together with 73017283, 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 (73017283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36508640 + 36508641.

It is an arithmetic number, because the mean of its divisors is an integer number (36508641).

Almost surely, 2^73017281 is an apocalyptic number.

It is an amenable number.

73017281 is a deficient number, since it is larger than the sum of its proper divisors (1).

73017281 is an equidigital number, since it uses as much as digits as its factorization.

73017281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 73017281 is about 8545.0149795071. The cubic root of 73017281 is about 417.9668956483.

The spelling of 73017281 in words is "seventy-three million, seventeen thousand, two hundred eighty-one".