836870139 has 24 divisors (see below), whose sum is σ = 1429140960. Its totient is φ = 461720448.

The previous prime is 836870137. The next prime is 836870149. The reversal of 836870139 is 931078638.

It is a happy number.

It is not a de Polignac number, because 836870139 - 2¹ = 836870137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 836870094 and 836870103.

It is not an unprimeable number, because it can be changed into a prime (836870137) 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, 227202 + ... + 230855.

It is an arithmetic number, because the mean of its divisors is an integer number (59547540).

Almost surely, 2^836870139 is an apocalyptic number.

836870139 is a deficient number, since it is larger than the sum of its proper divisors (592270821).

836870139 is a wasteful number, since it uses less digits than its factorization.

836870139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458099 (or 458096 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 836870139 is about 28928.7078695195. The cubic root of 836870139 is about 942.3654545069.

The spelling of 836870139 in words is "eight hundred thirty-six million, eight hundred seventy thousand, one hundred thirty-nine".