65839489 has 2 divisors, whose sum is σ = 65839490. Its totient is φ = 65839488.

The previous prime is 65839471. The next prime is 65839517. The reversal of 65839489 is 98493856.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59413264 + 6426225 = 7708^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 65839489 - 2¹¹ = 65837441 is a prime.

It is a super-2 number, since 2×65839489² = 8669676623562242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65839439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32919744 + 32919745.

It is an arithmetic number, because the mean of its divisors is an integer number (32919745).

Almost surely, 2^65839489 is an apocalyptic number.

It is an amenable number.

65839489 is a deficient number, since it is larger than the sum of its proper divisors (1).

65839489 is an equidigital number, since it uses as much as digits as its factorization.

65839489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 52.

The square root of 65839489 is about 8114.1536219128. The cubic root of 65839489 is about 403.7961283071.

The spelling of 65839489 in words is "sixty-five million, eight hundred thirty-nine thousand, four hundred eighty-nine".