42941909 has 4 divisors (see below), whose sum is σ = 43041516. Its totient is φ = 42842304.

The previous prime is 42941903. The next prime is 42941917. The reversal of 42941909 is 90914924.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4774225 + 38167684 = 2185^2 + 6178^2 .

It is a cyclic number.

It is not a de Polignac number, because 42941909 - 2⁴ = 42941893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42941903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49154 + ... + 50019.

It is an arithmetic number, because the mean of its divisors is an integer number (10760379).

Almost surely, 2^42941909 is an apocalyptic number.

It is an amenable number.

42941909 is a deficient number, since it is larger than the sum of its proper divisors (99607).

42941909 is an equidigital number, since it uses as much as digits as its factorization.

42941909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99606.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 42941909 is about 6553.0076300886. The cubic root of 42941909 is about 350.1819706802.

The spelling of 42941909 in words is "forty-two million, nine hundred forty-one thousand, nine hundred nine".