65621123 has 2 divisors, whose sum is σ = 65621124. Its totient is φ = 65621122.

The previous prime is 65621107. The next prime is 65621131. The reversal of 65621123 is 32112656.

65621123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65621123 - 2⁴ = 65621107 is a prime.

It is a super-2 number, since 2×65621123² = 8612263567562258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65621092 and 65621101.

It is not a weakly prime, because it can be changed into another prime (65621183) 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 as a sum of consecutive naturals, namely, 32810561 + 32810562.

It is an arithmetic number, because the mean of its divisors is an integer number (32810562).

Almost surely, 2^65621123 is an apocalyptic number.

65621123 is a deficient number, since it is larger than the sum of its proper divisors (1).

65621123 is an equidigital number, since it uses as much as digits as its factorization.

65621123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 65621123 is about 8100.6865758403. The cubic root of 65621123 is about 403.3492181588.

Adding to 65621123 its reverse (32112656), we get a palindrome (97733779).

The spelling of 65621123 in words is "sixty-five million, six hundred twenty-one thousand, one hundred twenty-three".