814397139 has 16 divisors (see below), whose sum is σ = 1207578240. Its totient is φ = 542452680.

The previous prime is 814397137. The next prime is 814397141. The reversal of 814397139 is 931793418.

814397139 is a `hidden beast` number, since 81 + 439 + 7 + 139 = 666.

814397139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (814397137) and next prime (814397141).

It is not a de Polignac number, because 814397139 - 2¹ = 814397137 is a prime.

It is a super-2 number, since 2×814397139² = 1326485400022770642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 814397094 and 814397103.

It is not an unprimeable number, because it can be changed into a prime (814397131) 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, 19344 + ... + 44754.

It is an arithmetic number, because the mean of its divisors is an integer number (75473640).

Almost surely, 2^814397139 is an apocalyptic number.

814397139 is a deficient number, since it is larger than the sum of its proper divisors (393181101).

814397139 is a wasteful number, since it uses less digits than its factorization.

814397139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26607 (or 26601 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 814397139 is about 28537.6442440507. The cubic root of 814397139 is about 933.8534905697.

The spelling of 814397139 in words is "eight hundred fourteen million, three hundred ninety-seven thousand, one hundred thirty-nine".