72684587 has 4 divisors (see below), whose sum is σ = 72788976. Its totient is φ = 72580200.

The previous prime is 72684581. The next prime is 72684589. The reversal of 72684587 is 78548627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78548627 = 83 ⋅946369.

It is a cyclic number.

It is not a de Polignac number, because 72684587 - 2¹⁰ = 72683563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72684581) 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 in 3 ways as a sum of consecutive naturals, for example, 51143 + ... + 52544.

It is an arithmetic number, because the mean of its divisors is an integer number (18197244).

Almost surely, 2^72684587 is an apocalyptic number.

72684587 is a deficient number, since it is larger than the sum of its proper divisors (104389).

72684587 is a wasteful number, since it uses less digits than its factorization.

72684587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104388.

The product of its digits is 752640, while the sum is 47.

The square root of 72684587 is about 8525.5256142950. The cubic root of 72684587 is about 417.3311246440.

The spelling of 72684587 in words is "seventy-two million, six hundred eighty-four thousand, five hundred eighty-seven".