65889121 has 2 divisors, whose sum is σ = 65889122. Its totient is φ = 65889120.

The previous prime is 65889113. The next prime is 65889133. The reversal of 65889121 is 12198856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55294096 + 10595025 = 7436^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 65889121 - 2³ = 65889113 is a prime.

It is not a weakly prime, because it can be changed into another prime (65889151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32944560 + 32944561.

It is an arithmetic number, because the mean of its divisors is an integer number (32944561).

Almost surely, 2^65889121 is an apocalyptic number.

It is an amenable number.

65889121 is a deficient number, since it is larger than the sum of its proper divisors (1).

65889121 is an equidigital number, since it uses as much as digits as its factorization.

65889121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 40.

The square root of 65889121 is about 8117.2114054027. The cubic root of 65889121 is about 403.8975678127.

The spelling of 65889121 in words is "sixty-five million, eight hundred eighty-nine thousand, one hundred twenty-one".