998929 has 4 divisors (see below), whose sum is σ = 1015920. Its totient is φ = 981940.

The previous prime is 998927. The next prime is 998941. The reversal of 998929 is 929899.

998929 = 100² + 101² + ... + 158².

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: 929899 = 59 ⋅15761.

It is a cyclic number.

It is not a de Polignac number, because 998929 - 2¹ = 998927 is a prime.

It is a Duffinian number.

998929 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (998927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8407 + ... + 8524.

It is an arithmetic number, because the mean of its divisors is an integer number (253980).

2⁹⁹⁸⁹²⁹ is an apocalyptic number.

It is an amenable number.

998929 is a deficient number, since it is larger than the sum of its proper divisors (16991).

998929 is a wasteful number, since it uses less digits than its factorization.

998929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16990.

The product of its digits is 104976, while the sum is 46.

The square root of 998929 is about 999.4643565430. The cubic root of 998929 is about 99.9642872475.

The spelling of 998929 in words is "nine hundred ninety-eight thousand, nine hundred twenty-nine".