730901681 has 2 divisors, whose sum is σ = 730901682. Its totient is φ = 730901680.

The previous prime is 730901669. The next prime is 730901683. The reversal of 730901681 is 186109037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376709281 + 354192400 = 19409^2 + 18820^2 .

It is a cyclic number.

It is not a de Polignac number, because 730901681 - 2¹⁰ = 730900657 is a prime.

It is a super-2 number, since 2×730901681² = 1068434534577251522, which contains 22 as substring.

Together with 730901683, 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 (730901683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365450840 + 365450841.

It is an arithmetic number, because the mean of its divisors is an integer number (365450841).

Almost surely, 2^730901681 is an apocalyptic number.

It is an amenable number.

730901681 is a deficient number, since it is larger than the sum of its proper divisors (1).

730901681 is an equidigital number, since it uses as much as digits as its factorization.

730901681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 730901681 is about 27035.1933782616. The cubic root of 730901681 is about 900.7819052704.

The spelling of 730901681 in words is "seven hundred thirty million, nine hundred one thousand, six hundred eighty-one".