65989837 has 2 divisors, whose sum is σ = 65989838. Its totient is φ = 65989836.

The previous prime is 65989817. The next prime is 65989843. The reversal of 65989837 is 73898956.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49294441 + 16695396 = 7021^2 + 4086^2 .

It is a cyclic number.

It is not a de Polignac number, because 65989837 - 2⁷ = 65989709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65989817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32994918 + 32994919.

It is an arithmetic number, because the mean of its divisors is an integer number (32994919).

Almost surely, 2^65989837 is an apocalyptic number.

It is an amenable number.

65989837 is a deficient number, since it is larger than the sum of its proper divisors (1).

65989837 is an equidigital number, since it uses as much as digits as its factorization.

65989837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The square root of 65989837 is about 8123.4128911437. The cubic root of 65989837 is about 404.1032580064.

The spelling of 65989837 in words is "sixty-five million, nine hundred eighty-nine thousand, eight hundred thirty-seven".