814986139 has 4 divisors (see below), whose sum is σ = 889075800. Its totient is φ = 740896480.

The previous prime is 814986127. The next prime is 814986167. The reversal of 814986139 is 931689418.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-814986139 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 814986092 and 814986101.

It is not an unprimeable number, because it can be changed into a prime (814986539) 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, 37044814 + ... + 37044835.

It is an arithmetic number, because the mean of its divisors is an integer number (222268950).

Almost surely, 2^814986139 is an apocalyptic number.

814986139 is a deficient number, since it is larger than the sum of its proper divisors (74089661).

814986139 is a wasteful number, since it uses less digits than its factorization.

814986139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74089660.

The product of its digits is 373248, while the sum is 49.

The square root of 814986139 is about 28547.9620813816. The cubic root of 814986139 is about 934.0785679635.

The spelling of 814986139 in words is "eight hundred fourteen million, nine hundred eighty-six thousand, one hundred thirty-nine".