42889129 has 2 divisors, whose sum is σ = 42889130. Its totient is φ = 42889128.

The previous prime is 42889117. The next prime is 42889159. The reversal of 42889129 is 92198824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31899904 + 10989225 = 5648^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 42889129 - 2¹⁷ = 42758057 is a prime.

It is not a weakly prime, because it can be changed into another prime (42889109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21444564 + 21444565.

It is an arithmetic number, because the mean of its divisors is an integer number (21444565).

Almost surely, 2^42889129 is an apocalyptic number.

It is an amenable number.

42889129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42889129 is an equidigital number, since it uses as much as digits as its factorization.

42889129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 43.

The square root of 42889129 is about 6548.9792334378. The cubic root of 42889129 is about 350.0384420361.

The spelling of 42889129 in words is "forty-two million, eight hundred eighty-nine thousand, one hundred twenty-nine".