72509187 has 8 divisors (see below), whose sum is σ = 101767360. Its totient is φ = 45795240.

The previous prime is 72509183. The next prime is 72509237. The reversal of 72509187 is 78190527.

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

It is not a de Polignac number, because 72509187 - 2² = 72509183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72509183) 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 7 ways as a sum of consecutive naturals, for example, 635989 + ... + 636102.

It is an arithmetic number, because the mean of its divisors is an integer number (12720920).

Almost surely, 2^72509187 is an apocalyptic number.

72509187 is a deficient number, since it is larger than the sum of its proper divisors (29258173).

72509187 is a wasteful number, since it uses less digits than its factorization.

72509187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272113.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 72509187 is about 8515.2326450896. The cubic root of 72509187 is about 416.9951577743.

The spelling of 72509187 in words is "seventy-two million, five hundred nine thousand, one hundred eighty-seven".