72716605 has 8 divisors (see below), whose sum is σ = 93972312. Its totient is φ = 53698368.

The previous prime is 72716603. The next prime is 72716621. The reversal of 72716605 is 50661727.

It can be written as a sum of positive squares in 4 ways, for example, as 75076 + 72641529 = 274^2 + 8523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72716605 - 2¹ = 72716603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72716603) 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 7 ways as a sum of consecutive naturals, for example, 559294 + ... + 559423.

It is an arithmetic number, because the mean of its divisors is an integer number (11746539).

Almost surely, 2^72716605 is an apocalyptic number.

It is an amenable number.

72716605 is a deficient number, since it is larger than the sum of its proper divisors (21255707).

72716605 is a wasteful number, since it uses less digits than its factorization.

72716605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118735.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 72716605 is about 8527.4031803357. The cubic root of 72716605 is about 417.3923946094.

The spelling of 72716605 in words is "seventy-two million, seven hundred sixteen thousand, six hundred five".