189039841 has 2 divisors, whose sum is σ = 189039842. Its totient is φ = 189039840.

The previous prime is 189039787. The next prime is 189039853. The reversal of 189039841 is 148930981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136983616 + 52056225 = 11704^2 + 7215^2 .

It is a cyclic number.

It is not a de Polignac number, because 189039841 - 2⁷ = 189039713 is a prime.

It is a super-2 number, since 2×189039841² = 71472122970610562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189039871) 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 as a sum of consecutive naturals, namely, 94519920 + 94519921.

It is an arithmetic number, because the mean of its divisors is an integer number (94519921).

Almost surely, 2^189039841 is an apocalyptic number.

It is an amenable number.

189039841 is a deficient number, since it is larger than the sum of its proper divisors (1).

189039841 is an equidigital number, since it uses as much as digits as its factorization.

189039841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 189039841 is about 13749.1760116743. The cubic root of 189039841 is about 573.9196763855.

The spelling of 189039841 in words is "one hundred eighty-nine million, thirty-nine thousand, eight hundred forty-one".