64043951 has 2 divisors, whose sum is σ = 64043952. Its totient is φ = 64043950.

The previous prime is 64043921. The next prime is 64043989. The reversal of 64043951 is 15934046.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64043951 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64043921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32021975 + 32021976.

It is an arithmetic number, because the mean of its divisors is an integer number (32021976).

Almost surely, 2^64043951 is an apocalyptic number.

64043951 is a deficient number, since it is larger than the sum of its proper divisors (1).

64043951 is an equidigital number, since it uses as much as digits as its factorization.

64043951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 64043951 is about 8002.7464660578. The cubic root of 64043951 is about 400.0915436311.

Adding to 64043951 its reverse (15934046), we get a palindrome (79977997).

The spelling of 64043951 in words is "sixty-four million, forty-three thousand, nine hundred fifty-one".