42008969 has 4 divisors (see below), whose sum is σ = 43033620. Its totient is φ = 40984320.

The previous prime is 42008957. The next prime is 42008977. The reversal of 42008969 is 96980024.

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 14341369 + 27667600 = 3787^2 + 5260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42008969 is a prime.

It is a super-2 number, since 2×42008969² = 3529506952885922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42001969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512264 + ... + 512345.

It is an arithmetic number, because the mean of its divisors is an integer number (10758405).

Almost surely, 2^42008969 is an apocalyptic number.

It is an amenable number.

42008969 is a deficient number, since it is larger than the sum of its proper divisors (1024651).

42008969 is a wasteful number, since it uses less digits than its factorization.

42008969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024650.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 42008969 is about 6481.4326348424. The cubic root of 42008969 is about 347.6274059680.

The spelling of 42008969 in words is "forty-two million, eight thousand, nine hundred sixty-nine".