64759649 has 2 divisors, whose sum is σ = 64759650. Its totient is φ = 64759648.

The previous prime is 64759637. The next prime is 64759691. The reversal of 64759649 is 94695746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60528400 + 4231249 = 7780^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 64759649 - 2²⁴ = 47982433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64759597 and 64759606.

It is not a weakly prime, because it can be changed into another prime (64759699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32379824 + 32379825.

It is an arithmetic number, because the mean of its divisors is an integer number (32379825).

Almost surely, 2^64759649 is an apocalyptic number.

It is an amenable number.

64759649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64759649 is an equidigital number, since it uses as much as digits as its factorization.

64759649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 64759649 is about 8047.3380070679. The cubic root of 64759649 is about 401.5763814760.

The spelling of 64759649 in words is "sixty-four million, seven hundred fifty-nine thousand, six hundred forty-nine".