989651 has 8 divisors (see below), whose sum is σ = 1073520. Its totient is φ = 906912.

The previous prime is 989647. The next prime is 989663. The reversal of 989651 is 156989.

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 989651 - 2² = 989647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989641) 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, 3356 + ... + 3638.

It is an arithmetic number, because the mean of its divisors is an integer number (134190).

2⁹⁸⁹⁶⁵¹ is an apocalyptic number.

989651 is a deficient number, since it is larger than the sum of its proper divisors (83869).

989651 is a wasteful number, since it uses less digits than its factorization.

989651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its digits is 19440, while the sum is 38.

The square root of 989651 is about 994.8120425487. The cubic root of 989651 is about 99.6538364238.

The spelling of 989651 in words is "nine hundred eighty-nine thousand, six hundred fifty-one".