72344471 has 4 divisors (see below), whose sum is σ = 72503232. Its totient is φ = 72185712.

The previous prime is 72344449. The next prime is 72344477. The reversal of 72344471 is 17444327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17444327 = 23 ⋅758449.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72344471 is a prime.

It is a super-3 number, since 3×72344471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72344477) 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, 78695 + ... + 79608.

It is an arithmetic number, because the mean of its divisors is an integer number (18125808).

Almost surely, 2^72344471 is an apocalyptic number.

72344471 is a deficient number, since it is larger than the sum of its proper divisors (158761).

72344471 is a wasteful number, since it uses less digits than its factorization.

72344471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158760.

The product of its digits is 18816, while the sum is 32.

The square root of 72344471 is about 8505.5553022716. Note that the first 3 decimals coincide. The cubic root of 72344471 is about 416.6791617231.

Adding to 72344471 its reverse (17444327), we get a palindrome (89788798).

The spelling of 72344471 in words is "seventy-two million, three hundred forty-four thousand, four hundred seventy-one".