65944939 has 2 divisors, whose sum is σ = 65944940. Its totient is φ = 65944938.

The previous prime is 65944937. The next prime is 65944961. The reversal of 65944939 is 93944956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65944939 - 2¹ = 65944937 is a prime.

Together with 65944937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 65944892 and 65944901.

It is not a weakly prime, because it can be changed into another prime (65944937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32972469 + 32972470.

It is an arithmetic number, because the mean of its divisors is an integer number (32972470).

Almost surely, 2^65944939 is an apocalyptic number.

65944939 is a deficient number, since it is larger than the sum of its proper divisors (1).

65944939 is an equidigital number, since it uses as much as digits as its factorization.

65944939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 49.

The square root of 65944939 is about 8120.6489272718. The cubic root of 65944939 is about 404.0115896260.

The spelling of 65944939 in words is "sixty-five million, nine hundred forty-four thousand, nine hundred thirty-nine".