100201998 has 16 divisors (see below), whose sum is σ = 215819856. Its totient is φ = 30831360.

The previous prime is 100201993. The next prime is 100202009. The reversal of 100201998 is 899102001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100201993) 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, 642243 + ... + 642398.

It is an arithmetic number, because the mean of its divisors is an integer number (13488741).

Almost surely, 2^100201998 is an apocalyptic number.

100201998 is an abundant number, since it is smaller than the sum of its proper divisors (115617858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100201998 is a wasteful number, since it uses less digits than its factorization.

100201998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284659.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 100201998 is about 10010.0948047459. The cubic root of 100201998 is about 464.4712037157.

Adding to 100201998 its reverse (899102001), we get a palindrome (999303999).

The spelling of 100201998 in words is "one hundred million, two hundred one thousand, nine hundred ninety-eight".