906989 has 8 divisors (see below), whose sum is σ = 938520. Its totient is φ = 876096.

The previous prime is 906973. The next prime is 907019. The reversal of 906989 is 989609.

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 697225 = 458^2 + 835^2 .

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 906989 - 2⁴ = 906973 is a prime.

It is a super-2 number, since 2×906989² = 1645258092242, which contains 22 as substring.

It is a Duffinian number.

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 906989.

It is not an unprimeable number, because it can be changed into a prime (906929) 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, 5699 + ... + 5855.

It is an arithmetic number, because the mean of its divisors is an integer number (117315).

2⁹⁰⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

906989 is a deficient number, since it is larger than the sum of its proper divisors (31531).

906989 is a wasteful number, since it uses less digits than its factorization.

906989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 906989 is about 952.3597009534. The cubic root of 906989 is about 96.7982130331.

The spelling of 906989 in words is "nine hundred six thousand, nine hundred eighty-nine".