427854620189 has 2 divisors, whose sum is σ = 427854620190. Its totient is φ = 427854620188.

The previous prime is 427854620173. The next prime is 427854620203. The reversal of 427854620189 is 981026458724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408333780100 + 19520840089 = 639010^2 + 139717^2 .

It is a cyclic number.

It is not a de Polignac number, because 427854620189 - 2⁴ = 427854620173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427854620489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213927310094 + 213927310095.

It is an arithmetic number, because the mean of its divisors is an integer number (213927310095).

Almost surely, 2^427854620189 is an apocalyptic number.

It is an amenable number.

427854620189 is a deficient number, since it is larger than the sum of its proper divisors (1).

427854620189 is an equidigital number, since it uses as much as digits as its factorization.

427854620189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 427854620189 in words is "four hundred twenty-seven billion, eight hundred fifty-four million, six hundred twenty thousand, one hundred eighty-nine".