42164189 has 2 divisors, whose sum is σ = 42164190. Its totient is φ = 42164188.

The previous prime is 42164149. The next prime is 42164207. The reversal of 42164189 is 98146124.

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., 28783225 + 13380964 = 5365^2 + 3658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42164189 is a prime.

It is equal to p_2556980 and since 42164189 and 2556980 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42164119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21082094 + 21082095.

It is an arithmetic number, because the mean of its divisors is an integer number (21082095).

Almost surely, 2^42164189 is an apocalyptic number.

It is an amenable number.

42164189 is a deficient number, since it is larger than the sum of its proper divisors (1).

42164189 is an equidigital number, since it uses as much as digits as its factorization.

42164189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 42164189 is about 6493.3957988097. The cubic root of 42164189 is about 348.0550321433.

The spelling of 42164189 in words is "forty-two million, one hundred sixty-four thousand, one hundred eighty-nine".