64543319 has 2 divisors, whose sum is σ = 64543320. Its totient is φ = 64543318.

The previous prime is 64543291. The next prime is 64543327. The reversal of 64543319 is 91334546.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64543319 is a prime.

It is a super-2 number, since 2×64543319² = 8331680055071522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64540319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32271659 + 32271660.

It is an arithmetic number, because the mean of its divisors is an integer number (32271660).

Almost surely, 2^64543319 is an apocalyptic number.

64543319 is a deficient number, since it is larger than the sum of its proper divisors (1).

64543319 is an equidigital number, since it uses as much as digits as its factorization.

64543319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 64543319 is about 8033.8856725746. The cubic root of 64543319 is about 401.1287265285.

The spelling of 64543319 in words is "sixty-four million, five hundred forty-three thousand, three hundred nineteen".