998177 has 4 divisors (see below), whose sum is σ = 1041600. Its totient is φ = 954756.

The previous prime is 998167. The next prime is 998197. The reversal of 998177 is 771899.

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 a cyclic number.

It is not a de Polignac number, because 998177 - 2⁴ = 998161 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 (998117) 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, 21677 + ... + 21722.

It is an arithmetic number, because the mean of its divisors is an integer number (260400).

2⁹⁹⁸¹⁷⁷ is an apocalyptic number.

It is an amenable number.

998177 is a deficient number, since it is larger than the sum of its proper divisors (43423).

998177 is a wasteful number, since it uses less digits than its factorization.

998177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43422.

The product of its digits is 31752, while the sum is 41.

The square root of 998177 is about 999.0880842048. The cubic root of 998177 is about 99.9391963700.

The spelling of 998177 in words is "nine hundred ninety-eight thousand, one hundred seventy-seven".