64743719 has 2 divisors, whose sum is σ = 64743720. Its totient is φ = 64743718.

The previous prime is 64743677. The next prime is 64743743. The reversal of 64743719 is 91734746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64743719 is a prime.

It is a super-2 number, since 2×64743719² = 8383498299901922, which contains 22 as substring.

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 (64743799) 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, 32371859 + 32371860.

It is an arithmetic number, because the mean of its divisors is an integer number (32371860).

Almost surely, 2^64743719 is an apocalyptic number.

64743719 is a deficient number, since it is larger than the sum of its proper divisors (1).

64743719 is an equidigital number, since it uses as much as digits as its factorization.

64743719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 64743719 is about 8046.3481779003. The cubic root of 64743719 is about 401.5434513182.

The spelling of 64743719 in words is "sixty-four million, seven hundred forty-three thousand, seven hundred nineteen".