189506641 has 4 divisors (see below), whose sum is σ = 193082292. Its totient is φ = 185930992.

The previous prime is 189506617. The next prime is 189506657. The reversal of 189506641 is 146605981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146605981 = 109 ⋅1345009.

It can be written as a sum of positive squares in 2 ways, for example, as 151807041 + 37699600 = 12321^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 189506641 - 2⁵ = 189506609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189506594 and 189506603.

It is not an unprimeable number, because it can be changed into a prime (189006641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787746 + ... + 1787851.

It is an arithmetic number, because the mean of its divisors is an integer number (48270573).

Almost surely, 2^189506641 is an apocalyptic number.

It is an amenable number.

189506641 is a deficient number, since it is larger than the sum of its proper divisors (3575651).

189506641 is an equidigital number, since it uses as much as digits as its factorization.

189506641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575650.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 189506641 is about 13766.1411078050. The cubic root of 189506641 is about 574.3916853379.

The spelling of 189506641 in words is "one hundred eighty-nine million, five hundred six thousand, six hundred forty-one".