64873423 has 4 divisors (see below), whose sum is σ = 65095128. Its totient is φ = 64651720.

The previous prime is 64873399. The next prime is 64873441. The reversal of 64873423 is 32437846.

It is a happy number.

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 64873423 - 2⁹ = 64872911 is a prime.

It is a super-2 number, since 2×64873423² = 8417122023473858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64873453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110413 + ... + 110998.

It is an arithmetic number, because the mean of its divisors is an integer number (16273782).

Almost surely, 2^64873423 is an apocalyptic number.

64873423 is a deficient number, since it is larger than the sum of its proper divisors (221705).

64873423 is a wasteful number, since it uses less digits than its factorization.

64873423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221704.

The product of its digits is 96768, while the sum is 37.

The square root of 64873423 is about 8054.4039506347. The cubic root of 64873423 is about 401.8114157994.

The spelling of 64873423 in words is "sixty-four million, eight hundred seventy-three thousand, four hundred twenty-three".