807972009 has 8 divisors (see below), whose sum is σ = 1160164992. Its totient is φ = 497213520.

The previous prime is 807972001. The next prime is 807972029. The reversal of 807972009 is 900279708.

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

It is not a de Polignac number, because 807972009 - 2³ = 807972001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (807972001) 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, 10358577 + ... + 10358654.

It is an arithmetic number, because the mean of its divisors is an integer number (145020624).

Almost surely, 2^807972009 is an apocalyptic number.

It is an amenable number.

807972009 is a deficient number, since it is larger than the sum of its proper divisors (352192983).

807972009 is a wasteful number, since it uses less digits than its factorization.

807972009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20717247.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 807972009 is about 28424.8484428677. The cubic root of 807972009 is about 931.3911461269.

The spelling of 807972009 in words is "eight hundred seven million, nine hundred seventy-two thousand, nine".