42209797 has 8 divisors (see below), whose sum is σ = 48341952. Its totient is φ = 36103200.

The previous prime is 42209777. The next prime is 42209803. The reversal of 42209797 is 79790224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42209797 - 2²³ = 33821189 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 (42209707) 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 7 ways as a sum of consecutive naturals, for example, 2704 + ... + 9577.

It is an arithmetic number, because the mean of its divisors is an integer number (6042744).

Almost surely, 2^42209797 is an apocalyptic number.

It is an amenable number.

42209797 is a deficient number, since it is larger than the sum of its proper divisors (6132155).

42209797 is a wasteful number, since it uses less digits than its factorization.

42209797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12779.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 42209797 is about 6496.9067255118. The cubic root of 42209797 is about 348.1804812046.

The spelling of 42209797 in words is "forty-two million, two hundred nine thousand, seven hundred ninety-seven".