72530303 has 4 divisors (see below), whose sum is σ = 72554328. Its totient is φ = 72506280.

The previous prime is 72530261. The next prime is 72530309. The reversal of 72530303 is 30303527.

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

It is a cyclic number.

It is not a de Polignac number, because 72530303 - 2¹⁰ = 72529279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72530309) 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, 6701 + ... + 13782.

It is an arithmetic number, because the mean of its divisors is an integer number (18138582).

Almost surely, 2^72530303 is an apocalyptic number.

72530303 is a deficient number, since it is larger than the sum of its proper divisors (24025).

72530303 is a wasteful number, since it uses less digits than its factorization.

72530303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24024.

The product of its (nonzero) digits is 1890, while the sum is 23.

The square root of 72530303 is about 8516.4724504926. The cubic root of 72530303 is about 417.0356327151.

The spelling of 72530303 in words is "seventy-two million, five hundred thirty thousand, three hundred three".