64994071 has 2 divisors, whose sum is σ = 64994072. Its totient is φ = 64994070.

The previous prime is 64994051. The next prime is 64994081. The reversal of 64994071 is 17049946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64994071 - 2¹⁷ = 64862999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64994051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32497035 + 32497036.

It is an arithmetic number, because the mean of its divisors is an integer number (32497036).

Almost surely, 2^64994071 is an apocalyptic number.

64994071 is a deficient number, since it is larger than the sum of its proper divisors (1).

64994071 is an equidigital number, since it uses as much as digits as its factorization.

64994071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 64994071 is about 8061.8900389425. The cubic root of 64994071 is about 402.0603504190.

The spelling of 64994071 in words is "sixty-four million, nine hundred ninety-four thousand, seventy-one".