851364729 has 16 divisors (see below), whose sum is σ = 1261977600. Its totient is φ = 567263088.

The previous prime is 851364719. The next prime is 851364797. The reversal of 851364729 is 927463158.

851364729 is a `hidden beast` number, since 8 + 513 + 64 + 72 + 9 = 666.

It is not a de Polignac number, because 851364729 - 2⁸ = 851364473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (851364719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47752 + ... + 63110.

It is an arithmetic number, because the mean of its divisors is an integer number (78873600).

Almost surely, 2^851364729 is an apocalyptic number.

It is an amenable number.

851364729 is a deficient number, since it is larger than the sum of its proper divisors (410612871).

851364729 is a wasteful number, since it uses less digits than its factorization.

851364729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17421 (or 17415 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 851364729 is about 29178.1549965038. The cubic root of 851364729 is about 947.7749325501.

The spelling of 851364729 in words is "eight hundred fifty-one million, three hundred sixty-four thousand, seven hundred twenty-nine".