42399323 has 4 divisors (see below), whose sum is σ = 42486168. Its totient is φ = 42312480.

The previous prime is 42399307. The next prime is 42399337. The reversal of 42399323 is 32399324.

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 42399323 - 2⁴ = 42399307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42399353) 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, 42686 + ... + 43667.

It is an arithmetic number, because the mean of its divisors is an integer number (10621542).

Almost surely, 2^42399323 is an apocalyptic number.

42399323 is a deficient number, since it is larger than the sum of its proper divisors (86845).

42399323 is an equidigital number, since it uses as much as digits as its factorization.

42399323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86844.

The product of its digits is 34992, while the sum is 35.

The square root of 42399323 is about 6511.4762535081. The cubic root of 42399323 is about 348.7008243334.

Subtracting from 42399323 its reverse (32399324), we obtain a palindrome (9999999).

The spelling of 42399323 in words is "forty-two million, three hundred ninety-nine thousand, three hundred twenty-three".