998061 has 4 divisors (see below), whose sum is σ = 1330752. Its totient is φ = 665372.

The previous prime is 998029. The next prime is 998069. The reversal of 998061 is 160899.

998061 = 329² + 330² + ... + 337².

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, and also an emirpimes, since its reverse is a distinct semiprime: 160899 = 3 ⋅53633.

It is a cyclic number.

It is not a de Polignac number, because 998061 - 2⁵ = 998029 is a prime.

It is a super-2 number, since 2×998061² = 1992251519442, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998069) 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 3 ways as a sum of consecutive naturals, for example, 166341 + ... + 166346.

It is an arithmetic number, because the mean of its divisors is an integer number (332688).

2⁹⁹⁸⁰⁶¹ is an apocalyptic number.

It is an amenable number.

998061 is a deficient number, since it is larger than the sum of its proper divisors (332691).

998061 is a wasteful number, since it uses less digits than its factorization.

998061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332690.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 998061 is about 999.0300295787. The cubic root of 998061 is about 99.9353248469.

The spelling of 998061 in words is "nine hundred ninety-eight thousand, sixty-one".