42398897 has 4 divisors (see below), whose sum is σ = 42708516. Its totient is φ = 42089280.

The previous prime is 42398893. The next prime is 42398921. The reversal of 42398897 is 79889324.

It is a happy number.

42398897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 25391521 + 17007376 = 5039^2 + 4124^2 .

It is a cyclic number.

It is not a de Polignac number, because 42398897 - 2² = 42398893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42398893) 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 in 3 ways as a sum of consecutive naturals, for example, 154604 + ... + 154877.

It is an arithmetic number, because the mean of its divisors is an integer number (10677129).

Almost surely, 2^42398897 is an apocalyptic number.

It is an amenable number.

42398897 is a deficient number, since it is larger than the sum of its proper divisors (309619).

42398897 is a wasteful number, since it uses less digits than its factorization.

42398897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309618.

The product of its digits is 870912, while the sum is 50.

The square root of 42398897 is about 6511.4435419498. The cubic root of 42398897 is about 348.6996564921.

The spelling of 42398897 in words is "forty-two million, three hundred ninety-eight thousand, eight hundred ninety-seven".