64674143 has 2 divisors, whose sum is σ = 64674144. Its totient is φ = 64674142.

The previous prime is 64674133. The next prime is 64674149. The reversal of 64674143 is 34147646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64674143 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64674149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32337071 + 32337072.

It is an arithmetic number, because the mean of its divisors is an integer number (32337072).

Almost surely, 2^64674143 is an apocalyptic number.

64674143 is a deficient number, since it is larger than the sum of its proper divisors (1).

64674143 is an equidigital number, since it uses as much as digits as its factorization.

64674143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 64674143 is about 8042.0235637556. The cubic root of 64674143 is about 401.3995619380.

The spelling of 64674143 in words is "sixty-four million, six hundred seventy-four thousand, one hundred forty-three".