72008999 has 8 divisors (see below), whose sum is σ = 72737280. Its totient is φ = 71284536.

The previous prime is 72008983. The next prime is 72009011. The reversal of 72008999 is 99980027.

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

It is a cyclic number.

It is not a de Polignac number, because 72008999 - 2⁴ = 72008983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72008099) 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, 49322 + ... + 50760.

It is an arithmetic number, because the mean of its divisors is an integer number (9092160).

Almost surely, 2^72008999 is an apocalyptic number.

72008999 is a deficient number, since it is larger than the sum of its proper divisors (728281).

72008999 is a wasteful number, since it uses less digits than its factorization.

72008999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 72008999 is about 8485.8116288308. The cubic root of 72008999 is about 416.0340959942.

The spelling of 72008999 in words is "seventy-two million, eight thousand, nine hundred ninety-nine".