64406123 has 4 divisors (see below), whose sum is σ = 64576440. Its totient is φ = 64235808.

The previous prime is 64406119. The next prime is 64406137. The reversal of 64406123 is 32160446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32160446 = 2 ⋅16080223.

It is a cyclic number.

It is not a de Polignac number, because 64406123 - 2² = 64406119 is a prime.

It is a super-2 number, since 2×64406123² = 8296297359782258, 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 = 64406092 and 64406101.

It is not an unprimeable number, because it can be changed into a prime (64406113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84590 + ... + 85347.

It is an arithmetic number, because the mean of its divisors is an integer number (16144110).

Almost surely, 2^64406123 is an apocalyptic number.

64406123 is a deficient number, since it is larger than the sum of its proper divisors (170317).

64406123 is a wasteful number, since it uses less digits than its factorization.

64406123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170316.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 64406123 is about 8025.3425472063. The cubic root of 64406123 is about 400.8443061971.

Adding to 64406123 its reverse (32160446), we get a palindrome (96566569).

The spelling of 64406123 in words is "sixty-four million, four hundred six thousand, one hundred twenty-three".