10887139 has 4 divisors (see below), whose sum is σ = 11181424. Its totient is φ = 10592856.

The previous prime is 10887137. The next prime is 10887161. The reversal of 10887139 is 93178801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10887139 - 2¹ = 10887137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 294247 = 10887139 / (1 + 0 + 8 + 8 + 7 + 1 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10887098 and 10887107.

It is not an unprimeable number, because it can be changed into a prime (10887137) 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, 147087 + ... + 147160.

It is an arithmetic number, because the mean of its divisors is an integer number (2795356).

Almost surely, 2^10887139 is an apocalyptic number.

10887139 is a deficient number, since it is larger than the sum of its proper divisors (294285).

10887139 is an equidigital number, since it uses as much as digits as its factorization.

10887139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294284.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 10887139 is about 3299.5664866767. The cubic root of 10887139 is about 221.6347848947.

It can be divided in two parts, 10887 and 139, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 10887139 in words is "ten million, eight hundred eighty-seven thousand, one hundred thirty-nine".