189163291 has 2 divisors, whose sum is σ = 189163292. Its totient is φ = 189163290.

The previous prime is 189163223. The next prime is 189163349. The reversal of 189163291 is 192361981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189163291 is a prime.

It is not a weakly prime, because it can be changed into another prime (189163211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94581645 + 94581646.

It is an arithmetic number, because the mean of its divisors is an integer number (94581646).

Almost surely, 2^189163291 is an apocalyptic number.

189163291 is a deficient number, since it is larger than the sum of its proper divisors (1).

189163291 is an equidigital number, since it uses as much as digits as its factorization.

189163291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 189163291 is about 13753.6646389244. The cubic root of 189163291 is about 574.0445794511.

The spelling of 189163291 in words is "one hundred eighty-nine million, one hundred sixty-three thousand, two hundred ninety-one".