64401223 has 4 divisors (see below), whose sum is σ = 64456048. Its totient is φ = 64346400.

The previous prime is 64401221. The next prime is 64401247. The reversal of 64401223 is 32210446.

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 64401223 - 2¹ = 64401221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64401194 and 64401203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25611 + ... + 28012.

It is an arithmetic number, because the mean of its divisors is an integer number (16114012).

Almost surely, 2^64401223 is an apocalyptic number.

64401223 is a deficient number, since it is larger than the sum of its proper divisors (54825).

64401223 is a wasteful number, since it uses less digits than its factorization.

64401223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54824.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 64401223 is about 8025.0372584805. The cubic root of 64401223 is about 400.8341405647.

Adding to 64401223 its reverse (32210446), we get a palindrome (96611669).

The spelling of 64401223 in words is "sixty-four million, four hundred one thousand, two hundred twenty-three".