791854221 has 4 divisors (see below), whose sum is σ = 1055805632. Its totient is φ = 527902812.

The previous prime is 791854211. The next prime is 791854229. The reversal of 791854221 is 122458197.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 791854221 - 2¹⁹ = 791329933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 791854221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791854229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131975701 + ... + 131975706.

It is an arithmetic number, because the mean of its divisors is an integer number (263951408).

Almost surely, 2^791854221 is an apocalyptic number.

It is an amenable number.

791854221 is a deficient number, since it is larger than the sum of its proper divisors (263951411).

791854221 is a wasteful number, since it uses less digits than its factorization.

791854221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263951410.

The product of its digits is 40320, while the sum is 39.

The square root of 791854221 is about 28139.9044241447. The cubic root of 791854221 is about 925.1562320965.

The spelling of 791854221 in words is "seven hundred ninety-one million, eight hundred fifty-four thousand, two hundred twenty-one".