72713306 has 4 divisors (see below), whose sum is σ = 109069962. Its totient is φ = 36356652.

The previous prime is 72713299. The next prime is 72713309. The reversal of 72713306 is 60331727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60331727 = 443 ⋅136189.

It can be written as a sum of positive squares in only one way, i.e., 72097081 + 616225 = 8491^2 + 785^2 .

It is not an unprimeable number, because it can be changed into a prime (72713309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18178325 + ... + 18178328.

Almost surely, 2^72713306 is an apocalyptic number.

72713306 is a deficient number, since it is larger than the sum of its proper divisors (36356656).

72713306 is a wasteful number, since it uses less digits than its factorization.

72713306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36356655.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 72713306 is about 8527.2097429347. The cubic root of 72713306 is about 417.3860824411.

The spelling of 72713306 in words is "seventy-two million, seven hundred thirteen thousand, three hundred six".