189103081 has 2 divisors, whose sum is σ = 189103082. Its totient is φ = 189103080.

The previous prime is 189103073. The next prime is 189103129. The reversal of 189103081 is 180301981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187936681 + 1166400 = 13709^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 189103081 - 2³ = 189103073 is a prime.

It is a super-2 number, since 2×189103081² = 71519950487385122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189103001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94551540 + 94551541.

It is an arithmetic number, because the mean of its divisors is an integer number (94551541).

Almost surely, 2^189103081 is an apocalyptic number.

It is an amenable number.

189103081 is a deficient number, since it is larger than the sum of its proper divisors (1).

189103081 is an equidigital number, since it uses as much as digits as its factorization.

189103081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 189103081 is about 13751.4755935500. The cubic root of 189103081 is about 573.9836675415.

The spelling of 189103081 in words is "one hundred eighty-nine million, one hundred three thousand, eighty-one".