730218961 has 2 divisors, whose sum is σ = 730218962. Its totient is φ = 730218960.

The previous prime is 730218959. The next prime is 730219031. The reversal of 730218961 is 169812037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565250625 + 164968336 = 23775^2 + 12844^2 .

It is a cyclic number.

It is not a de Polignac number, because 730218961 - 2¹ = 730218959 is a prime.

Together with 730218959, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 730218961.

It is not a weakly prime, because it can be changed into another prime (730218061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365109480 + 365109481.

It is an arithmetic number, because the mean of its divisors is an integer number (365109481).

Almost surely, 2^730218961 is an apocalyptic number.

It is an amenable number.

730218961 is a deficient number, since it is larger than the sum of its proper divisors (1).

730218961 is an equidigital number, since it uses as much as digits as its factorization.

730218961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 730218961 is about 27022.5639235066. The cubic root of 730218961 is about 900.5013507087.

The spelling of 730218961 in words is "seven hundred thirty million, two hundred eighteen thousand, nine hundred sixty-one".