72150009 has 8 divisors (see below), whose sum is σ = 96243840. Its totient is φ = 48078096.

The previous prime is 72149983. The next prime is 72150047. The reversal of 72150009 is 90005127.

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

It is not a de Polignac number, because 72150009 - 2⁵ = 72149977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72150079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5152 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (12030480).

Almost surely, 2^72150009 is an apocalyptic number.

It is an amenable number.

72150009 is a deficient number, since it is larger than the sum of its proper divisors (24093831).

72150009 is a wasteful number, since it uses less digits than its factorization.

72150009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10959.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 72150009 is about 8494.1161400113. The cubic root of 72150009 is about 416.3054820579.

The spelling of 72150009 in words is "seventy-two million, one hundred fifty thousand, nine".