72719413 has 4 divisors (see below), whose sum is σ = 78313228. Its totient is φ = 67125600.

The previous prime is 72719411. The next prime is 72719419. The reversal of 72719413 is 31491727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49660209 + 23059204 = 7047^2 + 4802^2 .

It is a cyclic number.

It is not a de Polignac number, because 72719413 - 2¹ = 72719411 is a prime.

It is a super-3 number, since 3×72719413³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72719411) 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, 2796888 + ... + 2796913.

It is an arithmetic number, because the mean of its divisors is an integer number (19578307).

Almost surely, 2^72719413 is an apocalyptic number.

It is an amenable number.

72719413 is a deficient number, since it is larger than the sum of its proper divisors (5593815).

72719413 is a wasteful number, since it uses less digits than its factorization.

72719413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593814.

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

The square root of 72719413 is about 8527.5678244151. The cubic root of 72719413 is about 417.3977671684.

The spelling of 72719413 in words is "seventy-two million, seven hundred nineteen thousand, four hundred thirteen".