64736849 has 2 divisors, whose sum is σ = 64736850. Its totient is φ = 64736848.

The previous prime is 64736843. The next prime is 64736863. The reversal of 64736849 is 94863746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56896849 + 7840000 = 7543^2 + 2800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64736849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64736843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32368424 + 32368425.

It is an arithmetic number, because the mean of its divisors is an integer number (32368425).

Almost surely, 2^64736849 is an apocalyptic number.

It is an amenable number.

64736849 is a deficient number, since it is larger than the sum of its proper divisors (1).

64736849 is an equidigital number, since it uses as much as digits as its factorization.

64736849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The square root of 64736849 is about 8045.9212648397. The cubic root of 64736849 is about 401.5292481331.

The spelling of 64736849 in words is "sixty-four million, seven hundred thirty-six thousand, eight hundred forty-nine".