42055993 has 4 divisors (see below), whose sum is σ = 48064000. Its totient is φ = 36047988.

The previous prime is 42055973. The next prime is 42055997. The reversal of 42055993 is 39955024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42055993 - 2⁵ = 42055961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42055997) 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, 3003993 + ... + 3004006.

It is an arithmetic number, because the mean of its divisors is an integer number (12016000).

Almost surely, 2^42055993 is an apocalyptic number.

It is an amenable number.

42055993 is a deficient number, since it is larger than the sum of its proper divisors (6008007).

42055993 is an equidigital number, since it uses as much as digits as its factorization.

42055993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008006.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 42055993 is about 6485.0592132994. The cubic root of 42055993 is about 347.7570666562.

The spelling of 42055993 in words is "forty-two million, fifty-five thousand, nine hundred ninety-three".