64843213 has 2 divisors, whose sum is σ = 64843214. Its totient is φ = 64843212.

The previous prime is 64843147. The next prime is 64843223. The reversal of 64843213 is 31234846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42536484 + 22306729 = 6522^2 + 4723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64843213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64843223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32421606 + 32421607.

It is an arithmetic number, because the mean of its divisors is an integer number (32421607).

Almost surely, 2^64843213 is an apocalyptic number.

It is an amenable number.

64843213 is a deficient number, since it is larger than the sum of its proper divisors (1).

64843213 is an equidigital number, since it uses as much as digits as its factorization.

64843213 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 64843213 is about 8052.5283607076. The cubic root of 64843213 is about 401.7490347963.

It can be divided in two parts, 64843 and 213, that added together give a palindrome (65056).

The spelling of 64843213 in words is "sixty-four million, eight hundred forty-three thousand, two hundred thirteen".