65091239 has 2 divisors, whose sum is σ = 65091240. Its totient is φ = 65091238.

The previous prime is 65091217. The next prime is 65091241. The reversal of 65091239 is 93219056.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65091239 is a prime.

Together with 65091241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 65091199 and 65091208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65091259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32545619 + 32545620.

It is an arithmetic number, because the mean of its divisors is an integer number (32545620).

Almost surely, 2^65091239 is an apocalyptic number.

65091239 is a deficient number, since it is larger than the sum of its proper divisors (1).

65091239 is an equidigital number, since it uses as much as digits as its factorization.

65091239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 65091239 is about 8067.9141666232. The cubic root of 65091239 is about 402.2606145698.

The spelling of 65091239 in words is "sixty-five million, ninety-one thousand, two hundred thirty-nine".