101998 has 8 divisors (see below), whose sum is σ = 164808. Its totient is φ = 47064.

The previous prime is 101987. The next prime is 101999. The reversal of 101998 is 899101.

101998 is nontrivially palindromic in base 11.

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

101998 is an undulating number in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936 + ... + 1987.

It is an arithmetic number, because the mean of its divisors is an integer number (20601).

2¹⁰¹⁹⁹⁸ is an apocalyptic number.

101998 is a deficient number, since it is larger than the sum of its proper divisors (62810).

101998 is a wasteful number, since it uses less digits than its factorization.

101998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 101998 is about 319.3712573166. The cubic root of 101998 is about 46.7229819006.

The spelling of 101998 in words is "one hundred one thousand, nine hundred ninety-eight".