65042239 has 2 divisors, whose sum is σ = 65042240. Its totient is φ = 65042238.

The previous prime is 65042233. The next prime is 65042261. The reversal of 65042239 is 93224056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65042239 - 2³ = 65042231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65042239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65042231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32521119 + 32521120.

It is an arithmetic number, because the mean of its divisors is an integer number (32521120).

Almost surely, 2^65042239 is an apocalyptic number.

65042239 is a deficient number, since it is larger than the sum of its proper divisors (1).

65042239 is an equidigital number, since it uses as much as digits as its factorization.

65042239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 65042239 is about 8064.8768744476. The cubic root of 65042239 is about 402.1596500442.

The spelling of 65042239 in words is "sixty-five million, forty-two thousand, two hundred thirty-nine".