7087139 has 4 divisors (see below), whose sum is σ = 7207320. Its totient is φ = 6966960.

The previous prime is 7087123. The next prime is 7087207. The reversal of 7087139 is 9317807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9317807 = 619 ⋅15053.

It is a cyclic number.

It is not a de Polignac number, because 7087139 - 2⁴ = 7087123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7087099 and 7087108.

It is not an unprimeable number, because it can be changed into a prime (7087109) 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, 60002 + ... + 60119.

It is an arithmetic number, because the mean of its divisors is an integer number (1801830).

Almost surely, 2^7087139 is an apocalyptic number.

7087139 is a deficient number, since it is larger than the sum of its proper divisors (120181).

7087139 is a wasteful number, since it uses less digits than its factorization.

7087139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120180.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 7087139 is about 2662.1681013790. The cubic root of 7087139 is about 192.0836133941.

The spelling of 7087139 in words is "seven million, eighty-seven thousand, one hundred thirty-nine".