1889172163 has 2 divisors, whose sum is σ = 1889172164. Its totient is φ = 1889172162.

The previous prime is 1889172151. The next prime is 1889172167. The reversal of 1889172163 is 3612719881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1889172163 - 2¹³ = 1889163971 is a prime.

It is a super-2 number, since 2×1889172163² = 7137942922908197138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1889172167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944586081 + 944586082.

It is an arithmetic number, because the mean of its divisors is an integer number (944586082).

Almost surely, 2^1889172163 is an apocalyptic number.

1889172163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889172163 is an equidigital number, since it uses as much as digits as its factorization.

1889172163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 1889172163 is about 43464.6081657249. The cubic root of 1889172163 is about 1236.2050475772.

The spelling of 1889172163 in words is "one billion, eight hundred eighty-nine million, one hundred seventy-two thousand, one hundred sixty-three".