908139 has 8 divisors (see below), whose sum is σ = 1216512. Its totient is φ = 602600.

The previous prime is 908137. The next prime is 908153. The reversal of 908139 is 931809.

It is a happy number.

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 908139 - 2¹ = 908137 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 908139.

It is not an unprimeable number, because it can be changed into a prime (908137) 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, 214 + ... + 1364.

It is an arithmetic number, because the mean of its divisors is an integer number (152064).

2⁹⁰⁸¹³⁹ is an apocalyptic number.

908139 is a deficient number, since it is larger than the sum of its proper divisors (308373).

908139 is a wasteful number, since it uses less digits than its factorization.

908139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417.

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

The square root of 908139 is about 952.9632731643. The cubic root of 908139 is about 96.8391069249.

The spelling of 908139 in words is "nine hundred eight thousand, one hundred thirty-nine".