851117738 has 16 divisors (see below), whose sum is σ = 1285095240. Its totient is φ = 422762496.

The previous prime is 851117669. The next prime is 851117747. The reversal of 851117738 is 837711158.

It is a happy number.

851117738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 456976129 + 394141609 = 21377^2 + 19853^2 .

It is a junction number, because it is equal to n+sod(n) for n = 851117695 and 851117704.

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, 196298 + ... + 200586.

Almost surely, 2^851117738 is an apocalyptic number.

851117738 is a deficient number, since it is larger than the sum of its proper divisors (433977502).

851117738 is a wasteful number, since it uses less digits than its factorization.

851117738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921.

The product of its digits is 47040, while the sum is 41.

The square root of 851117738 is about 29173.9222251654. The cubic root of 851117738 is about 947.6832701045.

The spelling of 851117738 in words is "eight hundred fifty-one million, one hundred seventeen thousand, seven hundred thirty-eight".