72375639 has 8 divisors (see below), whose sum is σ = 110286720. Its totient is φ = 41357496.

The previous prime is 72375637. The next prime is 72375643. The reversal of 72375639 is 93657327.

It is a happy number.

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

It is not a de Polignac number, because 72375639 - 2¹ = 72375637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72375639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72375637) 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, 1723209 + ... + 1723250.

It is an arithmetic number, because the mean of its divisors is an integer number (13785840).

Almost surely, 2^72375639 is an apocalyptic number.

72375639 is a deficient number, since it is larger than the sum of its proper divisors (37911081).

72375639 is a wasteful number, since it uses less digits than its factorization.

72375639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446469.

The product of its digits is 238140, while the sum is 42.

The square root of 72375639 is about 8507.3873192655. The cubic root of 72375639 is about 416.7389921027.

The spelling of 72375639 in words is "seventy-two million, three hundred seventy-five thousand, six hundred thirty-nine".