42945829 has 2 divisors, whose sum is σ = 42945830. Its totient is φ = 42945828.

The previous prime is 42945821. The next prime is 42945869. The reversal of 42945829 is 92854924.

It is a happy number.

42945829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27720225 + 15225604 = 5265^2 + 3902^2 .

It is a cyclic number.

It is not a de Polignac number, because 42945829 - 2³ = 42945821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42945821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21472914 + 21472915.

It is an arithmetic number, because the mean of its divisors is an integer number (21472915).

Almost surely, 2^42945829 is an apocalyptic number.

It is an amenable number.

42945829 is a deficient number, since it is larger than the sum of its proper divisors (1).

42945829 is an equidigital number, since it uses as much as digits as its factorization.

42945829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 42945829 is about 6553.3067225638. The cubic root of 42945829 is about 350.1926259398.

The spelling of 42945829 in words is "forty-two million, nine hundred forty-five thousand, eight hundred twenty-nine".