806942139 has 16 divisors (see below), whose sum is σ = 1143109920. Its totient is φ = 505370880.

The previous prime is 806942137. The next prime is 806942161. The reversal of 806942139 is 931249608.

It is not a de Polignac number, because 806942139 - 2¹ = 806942137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 806942139.

It is not an unprimeable number, because it can be changed into a prime (806942137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122122 + ... + 128559.

It is an arithmetic number, because the mean of its divisors is an integer number (71444370).

Almost surely, 2^806942139 is an apocalyptic number.

806942139 is a deficient number, since it is larger than the sum of its proper divisors (336167781).

806942139 is a wasteful number, since it uses less digits than its factorization.

806942139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250750.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 806942139 is about 28406.7270025957. The cubic root of 806942139 is about 930.9952497236.

The spelling of 806942139 in words is "eight hundred six million, nine hundred forty-two thousand, one hundred thirty-nine".