72913471 has 4 divisors (see below), whose sum is σ = 72930672. Its totient is φ = 72896272.

The previous prime is 72913433. The next prime is 72913481. The reversal of 72913471 is 17431927.

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 72913471 - 2¹³ = 72905279 is a prime.

It is a super-3 number, since 3×72913471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72913481) 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, 2766 + ... + 12388.

It is an arithmetic number, because the mean of its divisors is an integer number (18232668).

Almost surely, 2^72913471 is an apocalyptic number.

72913471 is a deficient number, since it is larger than the sum of its proper divisors (17201).

72913471 is an equidigital number, since it uses as much as digits as its factorization.

72913471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17200.

The product of its digits is 10584, while the sum is 34.

The square root of 72913471 is about 8538.9385171694. The cubic root of 72913471 is about 417.7687246516.

The spelling of 72913471 in words is "seventy-two million, nine hundred thirteen thousand, four hundred seventy-one".