909139 has 8 divisors (see below), whose sum is σ = 1133568. Its totient is φ = 708360.

The previous prime is 909133. The next prime is 909151. The reversal of 909139 is 931909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 909139 - 2⁵ = 909107 is a prime.

It is a Duffinian number.

909139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 909139.

It is not an unprimeable number, because it can be changed into a prime (909133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5827 + ... + 5980.

It is an arithmetic number, because the mean of its divisors is an integer number (141696).

2⁹⁰⁹¹³⁹ is an apocalyptic number.

909139 is a deficient number, since it is larger than the sum of its proper divisors (224429).

909139 is a wasteful number, since it uses less digits than its factorization.

909139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11825.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 909139 is about 953.4878079976. The cubic root of 909139 is about 96.8746387777.

It can be divided in two parts, 90 and 9139, that added together give a palindrome (9229).

The spelling of 909139 in words is "nine hundred nine thousand, one hundred thirty-nine".