64136843 has 2 divisors, whose sum is σ = 64136844. Its totient is φ = 64136842.

The previous prime is 64136819. The next prime is 64136867. The reversal of 64136843 is 34863146.

It is a balanced prime because it is at equal distance from previous prime (64136819) and next prime (64136867).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64136843 is a prime.

It is a super-2 number, since 2×64136843² = 8227069260013298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64136243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32068421 + 32068422.

It is an arithmetic number, because the mean of its divisors is an integer number (32068422).

Almost surely, 2^64136843 is an apocalyptic number.

64136843 is a deficient number, since it is larger than the sum of its proper divisors (1).

64136843 is an equidigital number, since it uses as much as digits as its factorization.

64136843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 64136843 is about 8008.5481206021. The cubic root of 64136843 is about 400.2848866342.

Adding to 64136843 its reverse (34863146), we get a palindrome (98999989).

The spelling of 64136843 in words is "sixty-four million, one hundred thirty-six thousand, eight hundred forty-three".