72690009 has 16 divisors (see below), whose sum is σ = 114339840. Its totient is φ = 40196880.

The previous prime is 72689999. The next prime is 72690047. The reversal of 72690009 is 90009627.

It is not a de Polignac number, because 72690009 - 2⁴ = 72689993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72690049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55179 + ... + 56480.

It is an arithmetic number, because the mean of its divisors is an integer number (7146240).

Almost surely, 2^72690009 is an apocalyptic number.

It is an amenable number.

72690009 is a deficient number, since it is larger than the sum of its proper divisors (41649831).

72690009 is a wasteful number, since it uses less digits than its factorization.

72690009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111700.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 72690009 is about 8525.8435946245. The cubic root of 72690009 is about 417.3415015028.

The spelling of 72690009 in words is "seventy-two million, six hundred ninety thousand, nine".