851097879 has 12 divisors (see below), whose sum is σ = 1233711336. Its totient is φ = 565391952.

The previous prime is 851097827. The next prime is 851097899. The reversal of 851097879 is 978790158.

It is not a de Polignac number, because 851097879 - 2⁸ = 851097623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851097899) 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 11 ways as a sum of consecutive naturals, for example, 164532 + ... + 169625.

It is an arithmetic number, because the mean of its divisors is an integer number (102809278).

Almost surely, 2^851097879 is an apocalyptic number.

851097879 is a deficient number, since it is larger than the sum of its proper divisors (382613457).

851097879 is a wasteful number, since it uses less digits than its factorization.

851097879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334446 (or 334443 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The square root of 851097879 is about 29173.5818678475. The cubic root of 851097879 is about 947.6758993309.

The spelling of 851097879 in words is "eight hundred fifty-one million, ninety-seven thousand, eight hundred seventy-nine".