72088609 has 4 divisors (see below), whose sum is σ = 74414080. Its totient is φ = 69763140.

The previous prime is 72088607. The next prime is 72088631. The reversal of 72088609 is 90688027.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90688027 = 233 ⋅389219.

It is a cyclic number.

It is not a de Polignac number, because 72088609 - 2¹ = 72088607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72088607) 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 3 ways as a sum of consecutive naturals, for example, 1162689 + ... + 1162750.

It is an arithmetic number, because the mean of its divisors is an integer number (18603520).

Almost surely, 2^72088609 is an apocalyptic number.

It is an amenable number.

72088609 is a deficient number, since it is larger than the sum of its proper divisors (2325471).

72088609 is a wasteful number, since it uses less digits than its factorization.

72088609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325470.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 72088609 is about 8490.5011041752. The cubic root of 72088609 is about 416.1873558960.

The spelling of 72088609 in words is "seventy-two million, eighty-eight thousand, six hundred nine".