64785143 has 2 divisors, whose sum is σ = 64785144. Its totient is φ = 64785142.

The previous prime is 64785139. The next prime is 64785167. The reversal of 64785143 is 34158746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64785143 - 2² = 64785139 is a prime.

It is a super-2 number, since 2×64785143² = 8394229507060898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64785097 and 64785106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64785173) 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, 32392571 + 32392572.

It is an arithmetic number, because the mean of its divisors is an integer number (32392572).

Almost surely, 2^64785143 is an apocalyptic number.

64785143 is a deficient number, since it is larger than the sum of its proper divisors (1).

64785143 is an equidigital number, since it uses as much as digits as its factorization.

64785143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 64785143 is about 8048.9218532671. The cubic root of 64785143 is about 401.6290708964.

The spelling of 64785143 in words is "sixty-four million, seven hundred eighty-five thousand, one hundred forty-three".