64841839 has 2 divisors, whose sum is σ = 64841840. Its totient is φ = 64841838.

The previous prime is 64841789. The next prime is 64841867. The reversal of 64841839 is 93814846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64841839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64841795 and 64841804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64841239) 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, 32420919 + 32420920.

It is an arithmetic number, because the mean of its divisors is an integer number (32420920).

Almost surely, 2^64841839 is an apocalyptic number.

64841839 is a deficient number, since it is larger than the sum of its proper divisors (1).

64841839 is an equidigital number, since it uses as much as digits as its factorization.

64841839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 64841839 is about 8052.4430454366. The cubic root of 64841839 is about 401.7461971461.

The spelling of 64841839 in words is "sixty-four million, eight hundred forty-one thousand, eight hundred thirty-nine".