998965 has 16 divisors (see below), whose sum is σ = 1342656. Its totient is φ = 707200.

The previous prime is 998957. The next prime is 998969. The reversal of 998965 is 569899.

It is a happy number.

It is not a de Polignac number, because 998965 - 2³ = 998957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2034 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (83916).

2⁹⁹⁸⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

998965 is a deficient number, since it is larger than the sum of its proper divisors (343691).

998965 is a wasteful number, since it uses less digits than its factorization.

998965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its digits is 174960, while the sum is 46.

The square root of 998965 is about 999.4823660275. The cubic root of 998965 is about 99.9654880907.

The spelling of 998965 in words is "nine hundred ninety-eight thousand, nine hundred sixty-five".