7889139 has 12 divisors (see below), whose sum is σ = 12065976. Its totient is φ = 4949952.

The previous prime is 7889111. The next prime is 7889143. The reversal of 7889139 is 9319887.

It is not a de Polignac number, because 7889139 - 2⁸ = 7888883 is a prime.

It is a super-2 number, since 2×7889139² = 124477028322642, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 7889094 and 7889103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7889149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25629 + ... + 25934.

It is an arithmetic number, because the mean of its divisors is an integer number (1005498).

Almost surely, 2^7889139 is an apocalyptic number.

7889139 is a deficient number, since it is larger than the sum of its proper divisors (4176837).

7889139 is a wasteful number, since it uses less digits than its factorization.

7889139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51586 (or 51583 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 7889139 is about 2808.7611147978. The cubic root of 7889139 is about 199.0718577561.

The spelling of 7889139 in words is "seven million, eight hundred eighty-nine thousand, one hundred thirty-nine".