842972807209 has 8 divisors (see below), whose sum is σ = 910103567240. Its totient is φ = 776168718336.

The previous prime is 842972807113. The next prime is 842972807213. The reversal of 842972807209 is 902708279248.

It can be written as a sum of positive squares in 4 ways, for example, as 174293725225 + 668679081984 = 417485^2 + 817728^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842972807209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842972807609) 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, 81662424 + ... + 81672745.

It is an arithmetic number, because the mean of its divisors is an integer number (113762945905).

Almost surely, 2^842972807209 is an apocalyptic number.

It is an amenable number.

842972807209 is a deficient number, since it is larger than the sum of its proper divisors (67130760031).

842972807209 is a wasteful number, since it uses less digits than its factorization.

842972807209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163335579.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 842972807209 in words is "eight hundred forty-two billion, nine hundred seventy-two million, eight hundred seven thousand, two hundred nine".