72897443 has 4 divisors (see below), whose sum is σ = 72914520. Its totient is φ = 72880368.

The previous prime is 72897431. The next prime is 72897491. The reversal of 72897443 is 34479827.

It is a Cunningham number, because it is equal to 8538²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72897443 - 2¹⁰ = 72896419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72897394 and 72897403.

It is not an unprimeable number, because it can be changed into a prime (72897403) 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, 4268 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (18228630).

Almost surely, 2^72897443 is an apocalyptic number.

72897443 is a deficient number, since it is larger than the sum of its proper divisors (17077).

72897443 is an equidigital number, since it uses as much as digits as its factorization.

72897443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17076.

The product of its digits is 338688, while the sum is 44.

The square root of 72897443 is about 8537.9999414383. Note that the first 4 decimals coincide. The cubic root of 72897443 is about 417.7381107941.

The spelling of 72897443 in words is "seventy-two million, eight hundred ninety-seven thousand, four hundred forty-three".