64123923 has 16 divisors (see below), whose sum is σ = 88646400. Its totient is φ = 41197536.

The previous prime is 64123909. The next prime is 64123957. The reversal of 64123923 is 32932146.

64123923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64123923 - 2⁴ = 64123907 is a prime.

It is a super-2 number, since 2×64123923² = 8223755001819858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64123123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9178 + ... + 14576.

It is an arithmetic number, because the mean of its divisors is an integer number (5540400).

Almost surely, 2^64123923 is an apocalyptic number.

64123923 is a deficient number, since it is larger than the sum of its proper divisors (24522477).

64123923 is a wasteful number, since it uses less digits than its factorization.

64123923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5546.

The product of its digits is 7776, while the sum is 30.

The square root of 64123923 is about 8007.7414418799. The cubic root of 64123923 is about 400.2580064625.

The spelling of 64123923 in words is "sixty-four million, one hundred twenty-three thousand, nine hundred twenty-three".