64947677 has 2 divisors, whose sum is σ = 64947678. Its totient is φ = 64947676.

The previous prime is 64947637. The next prime is 64947683. The reversal of 64947677 is 77674946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64947481 + 196 = 8059^2 + 14^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64947677 is a 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 (64947637) 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, 32473838 + 32473839.

It is an arithmetic number, because the mean of its divisors is an integer number (32473839).

Almost surely, 2^64947677 is an apocalyptic number.

It is an amenable number.

64947677 is a deficient number, since it is larger than the sum of its proper divisors (1).

64947677 is an equidigital number, since it uses as much as digits as its factorization.

64947677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 50.

The square root of 64947677 is about 8059.0121603085. The cubic root of 64947677 is about 401.9646615471.

The spelling of 64947677 in words is "sixty-four million, nine hundred forty-seven thousand, six hundred seventy-seven".