851342739 has 24 divisors (see below), whose sum is σ = 1268831232. Its totient is φ = 506993760.

The previous prime is 851342729. The next prime is 851342771. The reversal of 851342739 is 937243158.

It is not a de Polignac number, because 851342739 - 2⁵ = 851342707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 851342739.

It is not an unprimeable number, because it can be changed into a prime (851342729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11367 + ... + 42800.

It is an arithmetic number, because the mean of its divisors is an integer number (52867968).

Almost surely, 2^851342739 is an apocalyptic number.

851342739 is a deficient number, since it is larger than the sum of its proper divisors (417488493).

851342739 is a wasteful number, since it uses less digits than its factorization.

851342739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54227 (or 54214 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 851342739 is about 29177.7781710671. The cubic root of 851342739 is about 947.7667724164.

The spelling of 851342739 in words is "eight hundred fifty-one million, three hundred forty-two thousand, seven hundred thirty-nine".