67643123 has 4 divisors (see below), whose sum is σ = 67887600. Its totient is φ = 67398648.

The previous prime is 67643117. The next prime is 67643129. The reversal of 67643123 is 32134676.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (67643117) and next prime (67643129).

It is a cyclic number.

It is not a de Polignac number, because 67643123 - 2¹² = 67639027 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 67643123.

It is not an unprimeable number, because it can be changed into a prime (67643129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121823 + ... + 122376.

It is an arithmetic number, because the mean of its divisors is an integer number (16971900).

Almost surely, 2^67643123 is an apocalyptic number.

67643123 is a deficient number, since it is larger than the sum of its proper divisors (244477).

67643123 is a wasteful number, since it uses less digits than its factorization.

67643123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244476.

The product of its digits is 18144, while the sum is 32.

The square root of 67643123 is about 8224.5439387239. The cubic root of 67643123 is about 407.4502138481.

Adding to 67643123 its reverse (32134676), we get a palindrome (99777799).

The spelling of 67643123 in words is "sixty-seven million, six hundred forty-three thousand, one hundred twenty-three".