836138361 has 4 divisors (see below), whose sum is σ = 1114851152. Its totient is φ = 557425572.

The previous prime is 836138341. The next prime is 836138363. The reversal of 836138361 is 163831638.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-836138361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (836138363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139356391 + ... + 139356396.

It is an arithmetic number, because the mean of its divisors is an integer number (278712788).

Almost surely, 2^836138361 is an apocalyptic number.

It is an amenable number.

836138361 is a deficient number, since it is larger than the sum of its proper divisors (278712791).

836138361 is a wasteful number, since it uses less digits than its factorization.

836138361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278712790.

The product of its digits is 62208, while the sum is 39.

The square root of 836138361 is about 28916.0571482351. The cubic root of 836138361 is about 942.0906992514.

Adding to 836138361 its reverse (163831638), we get a palindrome (999969999).

The spelling of 836138361 in words is "eight hundred thirty-six million, one hundred thirty-eight thousand, three hundred sixty-one".