42494189 has 2 divisors, whose sum is σ = 42494190. Its totient is φ = 42494188.

The previous prime is 42494141. The next prime is 42494197. The reversal of 42494189 is 98149424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 15015625 = 5242^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 42494189 - 2¹² = 42490093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42494119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21247094 + 21247095.

It is an arithmetic number, because the mean of its divisors is an integer number (21247095).

Almost surely, 2^42494189 is an apocalyptic number.

It is an amenable number.

42494189 is a deficient number, since it is larger than the sum of its proper divisors (1).

42494189 is an equidigital number, since it uses as much as digits as its factorization.

42494189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 42494189 is about 6518.7567066121. The cubic root of 42494189 is about 348.9606964986.

The spelling of 42494189 in words is "forty-two million, four hundred ninety-four thousand, one hundred eighty-nine".