7834139 has 4 divisors (see below), whose sum is σ = 7845480. Its totient is φ = 7822800.

The previous prime is 7834117. The next prime is 7834153. The reversal of 7834139 is 9314387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9314387 = 887 ⋅10501.

It is a cyclic number.

It is not a de Polignac number, because 7834139 - 2⁸ = 7833883 is a prime.

It is a super-2 number, since 2×7834139² = 122747467742642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7834099 and 7834108.

It is not an unprimeable number, because it can be changed into a prime (7834199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4562 + ... + 6039.

It is an arithmetic number, because the mean of its divisors is an integer number (1961370).

Almost surely, 2^7834139 is an apocalyptic number.

7834139 is a deficient number, since it is larger than the sum of its proper divisors (11341).

7834139 is a wasteful number, since it uses less digits than its factorization.

7834139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11340.

The product of its digits is 18144, while the sum is 35.

The square root of 7834139 is about 2798.9531971793. The cubic root of 7834139 is about 198.6081613956.

The spelling of 7834139 in words is "seven million, eight hundred thirty-four thousand, one hundred thirty-nine".