1361311139 has 4 divisors (see below), whose sum is σ = 1374527856. Its totient is φ = 1348094424.

The previous prime is 1361311129. The next prime is 1361311199. The reversal of 1361311139 is 9311131631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361311139 - 2⁴ = 1361311123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361311129) 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, 6608204 + ... + 6608409.

It is an arithmetic number, because the mean of its divisors is an integer number (343631964).

Almost surely, 2^1361311139 is an apocalyptic number.

1361311139 is a deficient number, since it is larger than the sum of its proper divisors (13216717).

1361311139 is a wasteful number, since it uses less digits than its factorization.

1361311139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13216716.

The product of its digits is 1458, while the sum is 29.

The square root of 1361311139 is about 36895.9501707166. The cubic root of 1361311139 is about 1108.2875792495.

The spelling of 1361311139 in words is "one billion, three hundred sixty-one million, three hundred eleven thousand, one hundred thirty-nine".