72686593 has 4 divisors (see below), whose sum is σ = 83070400. Its totient is φ = 62302788.

The previous prime is 72686573. The next prime is 72686623. The reversal of 72686593 is 39568627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72686593 - 2¹⁷ = 72555521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72686513) 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, 5191893 + ... + 5191906.

It is an arithmetic number, because the mean of its divisors is an integer number (20767600).

Almost surely, 2^72686593 is an apocalyptic number.

It is an amenable number.

72686593 is a deficient number, since it is larger than the sum of its proper divisors (10383807).

72686593 is a wasteful number, since it uses less digits than its factorization.

72686593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10383806.

The product of its digits is 544320, while the sum is 46.

The square root of 72686593 is about 8525.6432601886. The cubic root of 72686593 is about 417.3349638739.

It can be divided in two parts, 7268 and 6593, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 72686593 in words is "seventy-two million, six hundred eighty-six thousand, five hundred ninety-three".