851930 has 8 divisors (see below), whose sum is σ = 1533492. Its totient is φ = 340768.

The previous prime is 851899. The next prime is 851953. The reversal of 851930 is 39158.

It is a Cunningham number, because it is equal to 923²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 851929 + 1 = 923^2 + 1^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 851930.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42587 + ... + 42606.

2⁸⁵¹⁹³⁰ is an apocalyptic number.

851930 is a deficient number, since it is larger than the sum of its proper divisors (681562).

851930 is a wasteful number, since it uses less digits than its factorization.

851930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85200.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 851930 is about 923.0005417117. Note that the first 3 decimals coincide. The cubic root of 851930 is about 94.7984647273.

The spelling of 851930 in words is "eight hundred fifty-one thousand, nine hundred thirty".