42108379 has 4 divisors (see below), whose sum is σ = 42542584. Its totient is φ = 41674176.

The previous prime is 42108349. The next prime is 42108401. The reversal of 42108379 is 97380124.

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 42108379 - 2⁵ = 42108347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42108349) 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, 216957 + ... + 217150.

It is an arithmetic number, because the mean of its divisors is an integer number (10635646).

Almost surely, 2^42108379 is an apocalyptic number.

42108379 is a deficient number, since it is larger than the sum of its proper divisors (434205).

42108379 is an equidigital number, since it uses as much as digits as its factorization.

42108379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434204.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 42108379 is about 6489.0969325477. The cubic root of 42108379 is about 347.9013983873.

The spelling of 42108379 in words is "forty-two million, one hundred eight thousand, three hundred seventy-nine".