64705943 has 2 divisors, whose sum is σ = 64705944. Its totient is φ = 64705942.

The previous prime is 64705919. The next prime is 64705957. The reversal of 64705943 is 34950746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64705943 - 2⁸ = 64705687 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64705897 and 64705906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64705243) 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, 32352971 + 32352972.

It is an arithmetic number, because the mean of its divisors is an integer number (32352972).

Almost surely, 2^64705943 is an apocalyptic number.

64705943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64705943 is an equidigital number, since it uses as much as digits as its factorization.

64705943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 64705943 is about 8044.0004351069. Note that the first 3 decimals coincide. The cubic root of 64705943 is about 401.4653399752.

The spelling of 64705943 in words is "sixty-four million, seven hundred five thousand, nine hundred forty-three".