72673243 has 4 divisors (see below), whose sum is σ = 73340080. Its totient is φ = 72006408.

The previous prime is 72673241. The next prime is 72673277. The reversal of 72673243 is 34237627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34237627 = 1543 ⋅22189.

It is a cyclic number.

It is not a de Polignac number, because 72673243 - 2¹ = 72673241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72673199 and 72673208.

It is not an unprimeable number, because it can be changed into a prime (72673241) 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, 333255 + ... + 333472.

It is an arithmetic number, because the mean of its divisors is an integer number (18335020).

Almost surely, 2^72673243 is an apocalyptic number.

72673243 is a deficient number, since it is larger than the sum of its proper divisors (666837).

72673243 is a wasteful number, since it uses less digits than its factorization.

72673243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666836.

The product of its digits is 42336, while the sum is 34.

The square root of 72673243 is about 8524.8602921104. The cubic root of 72673243 is about 417.3094123352.

The spelling of 72673243 in words is "seventy-two million, six hundred seventy-three thousand, two hundred forty-three".