7896139 has 2 divisors, whose sum is σ = 7896140. Its totient is φ = 7896138.

The previous prime is 7896089. The next prime is 7896157. The reversal of 7896139 is 9316987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7896139 - 2⁷ = 7896011 is a prime.

It is a super-2 number, since 2×7896139² = 124698022214642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7896095 and 7896104.

It is not a weakly prime, because it can be changed into another prime (7896179) 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 as a sum of consecutive naturals, namely, 3948069 + 3948070.

It is an arithmetic number, because the mean of its divisors is an integer number (3948070).

Almost surely, 2^7896139 is an apocalyptic number.

7896139 is a deficient number, since it is larger than the sum of its proper divisors (1).

7896139 is an equidigital number, since it uses as much as digits as its factorization.

7896139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 7896139 is about 2810.0069394932. The cubic root of 7896139 is about 199.1307188924.

The spelling of 7896139 in words is "seven million, eight hundred ninety-six thousand, one hundred thirty-nine".