65773889 has 2 divisors, whose sum is σ = 65773890. Its totient is φ = 65773888.

The previous prime is 65773853. The next prime is 65773891. The reversal of 65773889 is 98837756.

65773889 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 can be written as a sum of positive squares in only one way, i.e., 65739664 + 34225 = 8108^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 65773889 - 2¹² = 65769793 is a prime.

Together with 65773891, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65773889.

It is not a weakly prime, because it can be changed into another prime (65773819) 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, 32886944 + 32886945.

It is an arithmetic number, because the mean of its divisors is an integer number (32886945).

Almost surely, 2^65773889 is an apocalyptic number.

It is an amenable number.

65773889 is a deficient number, since it is larger than the sum of its proper divisors (1).

65773889 is an equidigital number, since it uses as much as digits as its factorization.

65773889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The square root of 65773889 is about 8110.1102951809. The cubic root of 65773889 is about 403.6619746310.

The spelling of 65773889 in words is "sixty-five million, seven hundred seventy-three thousand, eight hundred eighty-nine".