730815641 has 2 divisors, whose sum is σ = 730815642. Its totient is φ = 730815640.

The previous prime is 730815599. The next prime is 730815653. The reversal of 730815641 is 146518037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671587225 + 59228416 = 25915^2 + 7696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-730815641 is a prime.

It is a super-2 number, since 2×730815641² = 1068183002260481762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (730815661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365407820 + 365407821.

It is an arithmetic number, because the mean of its divisors is an integer number (365407821).

Almost surely, 2^730815641 is an apocalyptic number.

It is an amenable number.

730815641 is a deficient number, since it is larger than the sum of its proper divisors (1).

730815641 is an equidigital number, since it uses as much as digits as its factorization.

730815641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 730815641 is about 27033.6020722360. The cubic root of 730815641 is about 900.7465579187.

The spelling of 730815641 in words is "seven hundred thirty million, eight hundred fifteen thousand, six hundred forty-one".