73373281 has 2 divisors, whose sum is σ = 73373282. Its totient is φ = 73373280.

The previous prime is 73373159. The next prime is 73373299. The reversal of 73373281 is 18237337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60699681 + 12673600 = 7791^2 + 3560^2 .

It is a cyclic number.

It is not a de Polignac number, because 73373281 - 2²¹ = 71276129 is a prime.

It is a super-2 number, since 2×73373281² = 10767276729409922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73373081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36686640 + 36686641.

It is an arithmetic number, because the mean of its divisors is an integer number (36686641).

Almost surely, 2^73373281 is an apocalyptic number.

It is an amenable number.

73373281 is a deficient number, since it is larger than the sum of its proper divisors (1).

73373281 is an equidigital number, since it uses as much as digits as its factorization.

73373281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 73373281 is about 8565.8205094433. The cubic root of 73373281 is about 418.6450686514.

The spelling of 73373281 in words is "seventy-three million, three hundred seventy-three thousand, two hundred eighty-one".