64749313 has 2 divisors, whose sum is σ = 64749314. Its totient is φ = 64749312.

The previous prime is 64749287. The next prime is 64749317. The reversal of 64749313 is 31394746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62853184 + 1896129 = 7928^2 + 1377^2 .

It is a cyclic number.

It is not a de Polignac number, because 64749313 - 2⁵ = 64749281 is a prime.

It is not a weakly prime, because it can be changed into another prime (64749317) 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, 32374656 + 32374657.

It is an arithmetic number, because the mean of its divisors is an integer number (32374657).

Almost surely, 2^64749313 is an apocalyptic number.

It is an amenable number.

64749313 is a deficient number, since it is larger than the sum of its proper divisors (1).

64749313 is an equidigital number, since it uses as much as digits as its factorization.

64749313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 64749313 is about 8046.6957814994. The cubic root of 64749313 is about 401.5550157316. Note that the first 3 decimals are identical.

The spelling of 64749313 in words is "sixty-four million, seven hundred forty-nine thousand, three hundred thirteen".