42378199 has 4 divisors (see below), whose sum is σ = 42426864. Its totient is φ = 42329536.

The previous prime is 42378191. The next prime is 42378211. The reversal of 42378199 is 99187324.

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

It is a cyclic number.

It is not a de Polignac number, because 42378199 - 2³ = 42378191 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 (42378191) 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, 23002 + ... + 24775.

It is an arithmetic number, because the mean of its divisors is an integer number (10606716).

Almost surely, 2^42378199 is an apocalyptic number.

42378199 is a deficient number, since it is larger than the sum of its proper divisors (48665).

42378199 is an equidigital number, since it uses as much as digits as its factorization.

42378199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48664.

The product of its digits is 108864, while the sum is 43.

The square root of 42378199 is about 6509.8539922183. The cubic root of 42378199 is about 348.6429053282.

The spelling of 42378199 in words is "forty-two million, three hundred seventy-eight thousand, one hundred ninety-nine".