730149781 has 2 divisors, whose sum is σ = 730149782. Its totient is φ = 730149780.

The previous prime is 730149769. The next prime is 730149793. The reversal of 730149781 is 187941037.

730149781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (730149769) and next prime (730149793).

It can be written as a sum of positive squares in only one way, i.e., 481583025 + 248566756 = 21945^2 + 15766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-730149781 is a prime.

It is a super-2 number, since 2×730149781² = 1066237405388695922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (730149731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365074890 + 365074891.

It is an arithmetic number, because the mean of its divisors is an integer number (365074891).

Almost surely, 2^730149781 is an apocalyptic number.

It is an amenable number.

730149781 is a deficient number, since it is larger than the sum of its proper divisors (1).

730149781 is an equidigital number, since it uses as much as digits as its factorization.

730149781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 730149781 is about 27021.2838518084. The cubic root of 730149781 is about 900.4729123662.

The spelling of 730149781 in words is "seven hundred thirty million, one hundred forty-nine thousand, seven hundred eighty-one".