72293721443 has 4 divisors (see below), whose sum is σ = 72295398840. Its totient is φ = 72292044048.

The previous prime is 72293721419. The next prime is 72293721449. The reversal of 72293721443 is 34412739227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34412739227 = 47 ⋅732185941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72293721443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72293721394 and 72293721403.

It is not an unprimeable number, because it can be changed into a prime (72293721449) 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, 772298 + ... + 860831.

It is an arithmetic number, because the mean of its divisors is an integer number (18073849710).

Almost surely, 2^72293721443 is an apocalyptic number.

72293721443 is a deficient number, since it is larger than the sum of its proper divisors (1677397).

72293721443 is a wasteful number, since it uses less digits than its factorization.

72293721443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677396.

The product of its digits is 508032, while the sum is 44.

The spelling of 72293721443 in words is "seventy-two billion, two hundred ninety-three million, seven hundred twenty-one thousand, four hundred forty-three".