65650489 has 2 divisors, whose sum is σ = 65650490. Its totient is φ = 65650488.

The previous prime is 65650463. The next prime is 65650499. The reversal of 65650489 is 98405656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41473600 + 24176889 = 6440^2 + 4917^2 .

It is a cyclic number.

It is not a de Polignac number, because 65650489 - 2²¹ = 63553337 is a prime.

It is not a weakly prime, because it can be changed into another prime (65650439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32825244 + 32825245.

It is an arithmetic number, because the mean of its divisors is an integer number (32825245).

Almost surely, 2^65650489 is an apocalyptic number.

It is an amenable number.

65650489 is a deficient number, since it is larger than the sum of its proper divisors (1).

65650489 is an equidigital number, since it uses as much as digits as its factorization.

65650489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 65650489 is about 8102.4989355137. The cubic root of 65650489 is about 403.4093765659.

The spelling of 65650489 in words is "sixty-five million, six hundred fifty thousand, four hundred eighty-nine".