201839101 has 4 divisors (see below), whose sum is σ = 208799100. Its totient is φ = 194879104.

The previous prime is 201839089. The next prime is 201839123. The reversal of 201839101 is 101938102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127103076 + 74736025 = 11274^2 + 8645^2 .

It is a cyclic number.

It is not a de Polignac number, because 201839101 - 2¹⁵ = 201806333 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 (201839201) 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, 3479956 + ... + 3480013.

It is an arithmetic number, because the mean of its divisors is an integer number (52199775).

Almost surely, 2^201839101 is an apocalyptic number.

It is an amenable number.

201839101 is a deficient number, since it is larger than the sum of its proper divisors (6959999).

201839101 is an equidigital number, since it uses as much as digits as its factorization.

201839101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6959998.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 201839101 is about 14207.0088688647. The cubic root of 201839101 is about 586.5906024762.

Subtracting from 201839101 its reverse (101938102), we obtain a palindrome (99900999).

The spelling of 201839101 in words is "two hundred one million, eight hundred thirty-nine thousand, one hundred one".