42193913 has 4 divisors (see below), whose sum is σ = 42208080. Its totient is φ = 42179748.

The previous prime is 42193873. The next prime is 42193919. The reversal of 42193913 is 31939124.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42193913 - 2⁶ = 42193849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42193913.

It is not an unprimeable number, because it can be changed into a prime (42193919) 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, 695 + ... + 9212.

It is an arithmetic number, because the mean of its divisors is an integer number (10552020).

Almost surely, 2^42193913 is an apocalyptic number.

It is an amenable number.

42193913 is a deficient number, since it is larger than the sum of its proper divisors (14167).

42193913 is an equidigital number, since it uses as much as digits as its factorization.

42193913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14166.

The product of its digits is 5832, while the sum is 32.

The square root of 42193913 is about 6495.6841825939. The cubic root of 42193913 is about 348.1368010401.

The spelling of 42193913 in words is "forty-two million, one hundred ninety-three thousand, nine hundred thirteen".