64042423 has 4 divisors (see below), whose sum is σ = 64059640. Its totient is φ = 64025208.

The previous prime is 64042421. The next prime is 64042453. The reversal of 64042423 is 32424046.

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 64042423 - 2¹ = 64042421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64042421) 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, 453 + ... + 11326.

It is an arithmetic number, because the mean of its divisors is an integer number (16014910).

Almost surely, 2^64042423 is an apocalyptic number.

64042423 is a deficient number, since it is larger than the sum of its proper divisors (17217).

64042423 is a wasteful number, since it uses less digits than its factorization.

64042423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17216.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 64042423 is about 8002.6509982630. The cubic root of 64042423 is about 400.0883617291.

Adding to 64042423 its reverse (32424046), we get a palindrome (96466469).

The spelling of 64042423 in words is "sixty-four million, forty-two thousand, four hundred twenty-three".