72307043 has 4 divisors (see below), whose sum is σ = 72347640. Its totient is φ = 72266448.

The previous prime is 72307033. The next prime is 72307049. The reversal of 72307043 is 34070327.

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 72307043 - 2²⁴ = 55529827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72307049) 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, 17498 + ... + 21231.

It is an arithmetic number, because the mean of its divisors is an integer number (18086910).

Almost surely, 2^72307043 is an apocalyptic number.

72307043 is a deficient number, since it is larger than the sum of its proper divisors (40597).

72307043 is a wasteful number, since it uses less digits than its factorization.

72307043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40596.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 72307043 is about 8503.3548085447. The cubic root of 72307043 is about 416.6072918773.

The spelling of 72307043 in words is "seventy-two million, three hundred seven thousand, forty-three".