65591849 has 2 divisors, whose sum is σ = 65591850. Its totient is φ = 65591848.

The previous prime is 65591803. The next prime is 65591917. The reversal of 65591849 is 94819556.

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., 61152400 + 4439449 = 7820^2 + 2107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65591849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65591549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32795924 + 32795925.

It is an arithmetic number, because the mean of its divisors is an integer number (32795925).

Almost surely, 2^65591849 is an apocalyptic number.

It is an amenable number.

65591849 is a deficient number, since it is larger than the sum of its proper divisors (1).

65591849 is an equidigital number, since it uses as much as digits as its factorization.

65591849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 47.

The square root of 65591849 is about 8098.8794903987. The cubic root of 65591849 is about 403.2892303544.

The spelling of 65591849 in words is "sixty-five million, five hundred ninety-one thousand, eight hundred forty-nine".