730298561 has 4 divisors (see below), whose sum is σ = 755481300. Its totient is φ = 705115824.

The previous prime is 730298479. The next prime is 730298581. The reversal of 730298561 is 165892037.

730298561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165892037 = 7841 ⋅21157.

It can be written as a sum of positive squares in 2 ways, for example, as 318979600 + 411318961 = 17860^2 + 20281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-730298561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730298581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12591326 + ... + 12591383.

It is an arithmetic number, because the mean of its divisors is an integer number (188870325).

Almost surely, 2^730298561 is an apocalyptic number.

It is an amenable number.

730298561 is a deficient number, since it is larger than the sum of its proper divisors (25182739).

730298561 is a wasteful number, since it uses less digits than its factorization.

730298561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25182738.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 730298561 is about 27024.0367265884. The cubic root of 730298561 is about 900.5340702567.

The spelling of 730298561 in words is "seven hundred thirty million, two hundred ninety-eight thousand, five hundred sixty-one".