730033021 has 4 divisors (see below), whose sum is σ = 730130044. Its totient is φ = 729936000.

The previous prime is 730033013. The next prime is 730033027. The reversal of 730033021 is 120330037.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 309372921 + 420660100 = 17589^2 + 20510^2 .

It is a cyclic number.

It is not a de Polignac number, because 730033021 - 2³ = 730033013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 730033021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730033027) 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, 36180 + ... + 52621.

It is an arithmetic number, because the mean of its divisors is an integer number (182532511).

Almost surely, 2^730033021 is an apocalyptic number.

It is an amenable number.

730033021 is a deficient number, since it is larger than the sum of its proper divisors (97023).

730033021 is an equidigital number, since it uses as much as digits as its factorization.

730033021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97022.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 730033021 is about 27019.1232463231. The cubic root of 730033021 is about 900.4249108808.

Adding to 730033021 its reverse (120330037), we get a palindrome (850363058).

The spelling of 730033021 in words is "seven hundred thirty million, thirty-three thousand, twenty-one".