64128343 has 2 divisors, whose sum is σ = 64128344. Its totient is φ = 64128342.

The previous prime is 64128283. The next prime is 64128353. The reversal of 64128343 is 34382146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64128343 - 2²¹ = 62031191 is a prime.

It is a super-2 number, since 2×64128343² = 8224888751851298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64128353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32064171 + 32064172.

It is an arithmetic number, because the mean of its divisors is an integer number (32064172).

Almost surely, 2^64128343 is an apocalyptic number.

64128343 is a deficient number, since it is larger than the sum of its proper divisors (1).

64128343 is an equidigital number, since it uses as much as digits as its factorization.

64128343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

The square root of 64128343 is about 8008.0174200610. The cubic root of 64128343 is about 400.2672027170.

The spelling of 64128343 in words is "sixty-four million, one hundred twenty-eight thousand, three hundred forty-three".