730638281 has 2 divisors, whose sum is σ = 730638282. Its totient is φ = 730638280.

The previous prime is 730638253. The next prime is 730638289. The reversal of 730638281 is 182836037.

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., 710755600 + 19882681 = 26660^2 + 4459^2 .

It is a cyclic number.

It is not a de Polignac number, because 730638281 - 2¹⁴ = 730621897 is a prime.

It is a super-2 number, since 2×730638281² = 1067664595325269922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (730638289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365319140 + 365319141.

It is an arithmetic number, because the mean of its divisors is an integer number (365319141).

Almost surely, 2^730638281 is an apocalyptic number.

It is an amenable number.

730638281 is a deficient number, since it is larger than the sum of its proper divisors (1).

730638281 is an equidigital number, since it uses as much as digits as its factorization.

730638281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 730638281 is about 27030.3215112214. The cubic root of 730638281 is about 900.6736853062.

The spelling of 730638281 in words is "seven hundred thirty million, six hundred thirty-eight thousand, two hundred eighty-one".