64247143 has 2 divisors, whose sum is σ = 64247144. Its totient is φ = 64247142.

The previous prime is 64247137. The next prime is 64247201. The reversal of 64247143 is 34174246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64247143 - 2⁵ = 64247111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64241143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32123571 + 32123572.

It is an arithmetic number, because the mean of its divisors is an integer number (32123572).

Almost surely, 2^64247143 is an apocalyptic number.

64247143 is a deficient number, since it is larger than the sum of its proper divisors (1).

64247143 is an equidigital number, since it uses as much as digits as its factorization.

64247143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

The square root of 64247143 is about 8015.4315541959. The cubic root of 64247143 is about 400.5142199114.

The spelling of 64247143 in words is "sixty-four million, two hundred forty-seven thousand, one hundred forty-three".