998949 has 8 divisors (see below), whose sum is σ = 1522240. Its totient is φ = 570816.

The previous prime is 998947. The next prime is 998951. The reversal of 998949 is 949899.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (998947) and next prime (998951).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998949 - 2¹ = 998947 is a prime.

It is a Duffinian number.

It is a Curzon number.

998949 is a lucky number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 998898 and 998907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998941) 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, 23764 + ... + 23805.

It is an arithmetic number, because the mean of its divisors is an integer number (190280).

2⁹⁹⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

998949 is a deficient number, since it is larger than the sum of its proper divisors (523291).

998949 is a wasteful number, since it uses less digits than its factorization.

998949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47579.

The product of its digits is 209952, while the sum is 48.

The square root of 998949 is about 999.4743618523. The cubic root of 998949 is about 99.9649543862.

The spelling of 998949 in words is "nine hundred ninety-eight thousand, nine hundred forty-nine".