189559901 has 4 divisors (see below), whose sum is σ = 190522332. Its totient is φ = 188597472.

The previous prime is 189559897. The next prime is 189559907. The reversal of 189559901 is 109955981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109955981 = 277 ⋅396953.

It can be written as a sum of positive squares in 2 ways, for example, as 92064025 + 97495876 = 9595^2 + 9874^2 .

It is a cyclic number.

It is not a de Polignac number, because 189559901 - 2² = 189559897 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 (189559907) 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, 480920 + ... + 481313.

It is an arithmetic number, because the mean of its divisors is an integer number (47630583).

Almost surely, 2^189559901 is an apocalyptic number.

It is an amenable number.

189559901 is a deficient number, since it is larger than the sum of its proper divisors (962431).

189559901 is an equidigital number, since it uses as much as digits as its factorization.

189559901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962430.

The product of its (nonzero) digits is 145800, while the sum is 47.

The square root of 189559901 is about 13768.0754283233. The cubic root of 189559901 is about 574.4454903752.

The spelling of 189559901 in words is "one hundred eighty-nine million, five hundred fifty-nine thousand, nine hundred one".