72330013 has 4 divisors (see below), whose sum is σ = 82662880. Its totient is φ = 61997148.

The previous prime is 72329987. The next prime is 72330023. The reversal of 72330013 is 31003327.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31003327 = 193 ⋅160639.

It is a cyclic number.

It is not a de Polignac number, because 72330013 - 2⁹ = 72329501 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 (72330023) 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, 5166423 + ... + 5166436.

It is an arithmetic number, because the mean of its divisors is an integer number (20665720).

Almost surely, 2^72330013 is an apocalyptic number.

It is an amenable number.

72330013 is a deficient number, since it is larger than the sum of its proper divisors (10332867).

72330013 is a wasteful number, since it uses less digits than its factorization.

72330013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332866.

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

The square root of 72330013 is about 8504.7053446901. The cubic root of 72330013 is about 416.6514021786.

The spelling of 72330013 in words is "seventy-two million, three hundred thirty thousand, thirteen".