65491859 has 2 divisors, whose sum is σ = 65491860. Its totient is φ = 65491858.

The previous prime is 65491849. The next prime is 65491861. The reversal of 65491859 is 95819456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65491859 - 2⁴ = 65491843 is a prime.

Together with 65491861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65491819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32745929 + 32745930.

It is an arithmetic number, because the mean of its divisors is an integer number (32745930).

Almost surely, 2^65491859 is an apocalyptic number.

65491859 is a deficient number, since it is larger than the sum of its proper divisors (1).

65491859 is an equidigital number, since it uses as much as digits as its factorization.

65491859 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 65491859 is about 8092.7040598307. The cubic root of 65491859 is about 403.0841977733.

The spelling of 65491859 in words is "sixty-five million, four hundred ninety-one thousand, eight hundred fifty-nine".