989697 has 4 divisors (see below), whose sum is σ = 1319600. Its totient is φ = 659796.

The previous prime is 989687. The next prime is 989719. The reversal of 989697 is 796989.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 989697 - 2⁸ = 989441 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 (989647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164947 + ... + 164952.

It is an arithmetic number, because the mean of its divisors is an integer number (329900).

2⁹⁸⁹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

989697 is a deficient number, since it is larger than the sum of its proper divisors (329903).

989697 is a wasteful number, since it uses less digits than its factorization.

989697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329902.

The product of its digits is 244944, while the sum is 48.

The square root of 989697 is about 994.8351622254. The cubic root of 989697 is about 99.6553804043.

The spelling of 989697 in words is "nine hundred eighty-nine thousand, six hundred ninety-seven".