64636123 has 2 divisors, whose sum is σ = 64636124. Its totient is φ = 64636122.

The previous prime is 64636109. The next prime is 64636129. The reversal of 64636123 is 32163646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64636123 - 2⁹ = 64635611 is a prime.

It is a super-2 number, since 2×64636123² = 8355656792942258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64636129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32318061 + 32318062.

It is an arithmetic number, because the mean of its divisors is an integer number (32318062).

Almost surely, 2^64636123 is an apocalyptic number.

64636123 is a deficient number, since it is larger than the sum of its proper divisors (1).

64636123 is an equidigital number, since it uses as much as digits as its factorization.

64636123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 64636123 is about 8039.6593833321. The cubic root of 64636123 is about 401.3208895755.

Adding to 64636123 its reverse (32163646), we get a palindrome (96799769).

The spelling of 64636123 in words is "sixty-four million, six hundred thirty-six thousand, one hundred twenty-three".