427760189 has 2 divisors, whose sum is σ = 427760190. Its totient is φ = 427760188.

The previous prime is 427760183. The next prime is 427760327. The reversal of 427760189 is 981067724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394697689 + 33062500 = 19867^2 + 5750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427760189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427760183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213880094 + 213880095.

It is an arithmetic number, because the mean of its divisors is an integer number (213880095).

Almost surely, 2^427760189 is an apocalyptic number.

It is an amenable number.

427760189 is a deficient number, since it is larger than the sum of its proper divisors (1).

427760189 is an equidigital number, since it uses as much as digits as its factorization.

427760189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 427760189 is about 20682.3642023827. The cubic root of 427760189 is about 753.4714268778.

The spelling of 427760189 in words is "four hundred twenty-seven million, seven hundred sixty thousand, one hundred eighty-nine".