851400009 has 24 divisors (see below), whose sum is σ = 1273708800. Its totient is φ = 547380960.

The previous prime is 851399953. The next prime is 851400037. The reversal of 851400009 is 900004158.

It is not a de Polignac number, because 851400009 - 2¹² = 851395913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (851400049) 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 23 ways as a sum of consecutive naturals, for example, 327304 + ... + 329894.

It is an arithmetic number, because the mean of its divisors is an integer number (53071200).

Almost surely, 2^851400009 is an apocalyptic number.

It is an amenable number.

851400009 is a deficient number, since it is larger than the sum of its proper divisors (422308791).

851400009 is a wasteful number, since it uses less digits than its factorization.

851400009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885 (or 3882 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 851400009 is about 29178.7595521126. The cubic root of 851400009 is about 947.7880240946.

The spelling of 851400009 in words is "eight hundred fifty-one million, four hundred thousand, nine".