275564189 has 2 divisors, whose sum is σ = 275564190. Its totient is φ = 275564188.

The previous prime is 275564143. The next prime is 275564213. The reversal of 275564189 is 981465572.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220284964 + 55279225 = 14842^2 + 7435^2 .

It is a cyclic number.

It is not a de Polignac number, because 275564189 - 2⁸ = 275563933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275564489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137782094 + 137782095.

It is an arithmetic number, because the mean of its divisors is an integer number (137782095).

Almost surely, 2^275564189 is an apocalyptic number.

It is an amenable number.

275564189 is a deficient number, since it is larger than the sum of its proper divisors (1).

275564189 is an equidigital number, since it uses as much as digits as its factorization.

275564189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 275564189 is about 16600.1261742193. The cubic root of 275564189 is about 650.7401344273.

The spelling of 275564189 in words is "two hundred seventy-five million, five hundred sixty-four thousand, one hundred eighty-nine".