850691878 has 4 divisors (see below), whose sum is σ = 1276037820. Its totient is φ = 425345938.

The previous prime is 850691873. The next prime is 850691893. The reversal of 850691878 is 878196058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878196058 = 2 ⋅439098029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850691873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212672968 + ... + 212672971.

It is an arithmetic number, because the mean of its divisors is an integer number (319009455).

Almost surely, 2^850691878 is an apocalyptic number.

850691878 is a deficient number, since it is larger than the sum of its proper divisors (425345942).

850691878 is a wasteful number, since it uses less digits than its factorization.

850691878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425345941.

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 850691878 is about 29166.6226704430. The cubic root of 850691878 is about 947.5251847581.

The spelling of 850691878 in words is "eight hundred fifty million, six hundred ninety-one thousand, eight hundred seventy-eight".