791211985 has 8 divisors (see below), whose sum is σ = 949648896. Its totient is φ = 632839920.

The previous prime is 791211913. The next prime is 791212013. The reversal of 791211985 is 589112197.

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

It is not a de Polignac number, because 791211985 - 2²⁵ = 757657553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16720 + ... + 43150.

It is an arithmetic number, because the mean of its divisors is an integer number (118706112).

Almost surely, 2^791211985 is an apocalyptic number.

It is an amenable number.

791211985 is a deficient number, since it is larger than the sum of its proper divisors (158436911).

791211985 is a wasteful number, since it uses less digits than its factorization.

791211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32423.

The product of its digits is 45360, while the sum is 43.

The square root of 791211985 is about 28128.4906278314. The cubic root of 791211985 is about 924.9060474334.

The spelling of 791211985 in words is "seven hundred ninety-one million, two hundred eleven thousand, nine hundred eighty-five".