201898123 has 16 divisors (see below), whose sum is σ = 244817920. Its totient is φ = 162642816.

The previous prime is 201898121. The next prime is 201898127. The reversal of 201898123 is 321898102.

It is not a de Polignac number, because 201898123 - 2¹ = 201898121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201898121) 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 15 ways as a sum of consecutive naturals, for example, 10915 + ... + 22867.

It is an arithmetic number, because the mean of its divisors is an integer number (15301120).

Almost surely, 2^201898123 is an apocalyptic number.

201898123 is a deficient number, since it is larger than the sum of its proper divisors (42919797).

201898123 is a wasteful number, since it uses less digits than its factorization.

201898123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12106.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 201898123 is about 14209.0859311921. The cubic root of 201898123 is about 586.6477740487.

The spelling of 201898123 in words is "two hundred one million, eight hundred ninety-eight thousand, one hundred twenty-three".