72543307 has 4 divisors (see below), whose sum is σ = 72860320. Its totient is φ = 72226296.

The previous prime is 72543287. The next prime is 72543319. The reversal of 72543307 is 70334527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70334527 = 271 ⋅259537.

It is a cyclic number.

It is not a de Polignac number, because 72543307 - 2¹⁵ = 72510539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72543397) 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, 158163 + ... + 158620.

It is an arithmetic number, because the mean of its divisors is an integer number (18215080).

Almost surely, 2^72543307 is an apocalyptic number.

72543307 is a deficient number, since it is larger than the sum of its proper divisors (317013).

72543307 is a wasteful number, since it uses less digits than its factorization.

72543307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317012.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 72543307 is about 8517.2358779125. The cubic root of 72543307 is about 417.0605547457.

The spelling of 72543307 in words is "seventy-two million, five hundred forty-three thousand, three hundred seven".