890139 has 4 divisors (see below), whose sum is σ = 1186856. Its totient is φ = 593424.

The previous prime is 890129. The next prime is 890147. The reversal of 890139 is 931098.

It is a happy number.

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

It is not a de Polignac number, because 890139 - 2⁵ = 890107 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148354 + ... + 148359.

It is an arithmetic number, because the mean of its divisors is an integer number (296714).

2⁸⁹⁰¹³⁹ is an apocalyptic number.

890139 is a deficient number, since it is larger than the sum of its proper divisors (296717).

890139 is a wasteful number, since it uses less digits than its factorization.

890139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296716.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 890139 is about 943.4717801821. The cubic root of 890139 is about 96.1950245452.

The spelling of 890139 in words is "eight hundred ninety thousand, one hundred thirty-nine".