64121723 has 8 divisors (see below), whose sum is σ = 67561728. Its totient is φ = 60736104.

The previous prime is 64121719. The next prime is 64121779. The reversal of 64121723 is 32712146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64121723 - 2² = 64121719 is a prime.

It is a super-2 number, since 2×64121723² = 8223190720977458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64121692 and 64121701.

It is not an unprimeable number, because it can be changed into a prime (64121623) 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 7 ways as a sum of consecutive naturals, for example, 11165 + ... + 15902.

It is an arithmetic number, because the mean of its divisors is an integer number (8445216).

Almost surely, 2^64121723 is an apocalyptic number.

64121723 is a deficient number, since it is larger than the sum of its proper divisors (3440005).

64121723 is a wasteful number, since it uses less digits than its factorization.

64121723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27193.

The product of its digits is 2016, while the sum is 26.

The square root of 64121723 is about 8007.6040736290. The cubic root of 64121723 is about 400.2534289838.

Adding to 64121723 its reverse (32712146), we get a palindrome (96833869).

The spelling of 64121723 in words is "sixty-four million, one hundred twenty-one thousand, seven hundred twenty-three".