42393811 has 4 divisors (see below), whose sum is σ = 42406992. Its totient is φ = 42380632.

The previous prime is 42393797. The next prime is 42393821. The reversal of 42393811 is 11839324.

It is a semiprime because it is the product of two primes, 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 42393811 - 2⁵ = 42393779 is a prime.

It is a super-2 number, since 2×42393811² = 3594470422207442, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (42393821) 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, 1770 + ... + 9376.

It is an arithmetic number, because the mean of its divisors is an integer number (10601748).

Almost surely, 2^42393811 is an apocalyptic number.

42393811 is a deficient number, since it is larger than the sum of its proper divisors (13181).

42393811 is an equidigital number, since it uses as much as digits as its factorization.

42393811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180.

The product of its digits is 5184, while the sum is 31.

The square root of 42393811 is about 6511.0529870367. The cubic root of 42393811 is about 348.6857130683.

The spelling of 42393811 in words is "forty-two million, three hundred ninety-three thousand, eight hundred eleven".