730235661 has 4 divisors (see below), whose sum is σ = 973647552. Its totient is φ = 486823772.

The previous prime is 730235651. The next prime is 730235669. The reversal of 730235661 is 166532037.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 730235661 - 2²³ = 721847053 is a prime.

It is a super-2 number, since 2×730235661² = 1066488241192213842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730235669) 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 in 3 ways as a sum of consecutive naturals, for example, 121705941 + ... + 121705946.

It is an arithmetic number, because the mean of its divisors is an integer number (243411888).

Almost surely, 2^730235661 is an apocalyptic number.

It is an amenable number.

730235661 is a deficient number, since it is larger than the sum of its proper divisors (243411891).

730235661 is a wasteful number, since it uses less digits than its factorization.

730235661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243411890.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 730235661 is about 27022.8729227667. The cubic root of 730235661 is about 900.5082154341.

Adding to 730235661 its reverse (166532037), we get a palindrome (896767698).

The spelling of 730235661 in words is "seven hundred thirty million, two hundred thirty-five thousand, six hundred sixty-one".