64549943 has 2 divisors, whose sum is σ = 64549944. Its totient is φ = 64549942.

The previous prime is 64549913. The next prime is 64549957. The reversal of 64549943 is 34994546.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64549943 - 2⁸ = 64549687 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64549894 and 64549903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64549913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32274971 + 32274972.

It is an arithmetic number, because the mean of its divisors is an integer number (32274972).

Almost surely, 2^64549943 is an apocalyptic number.

64549943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64549943 is an equidigital number, since it uses as much as digits as its factorization.

64549943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 44.

The square root of 64549943 is about 8034.2979158107. The cubic root of 64549943 is about 401.1424485054.

The spelling of 64549943 in words is "sixty-four million, five hundred forty-nine thousand, nine hundred forty-three".