64911449 has 2 divisors, whose sum is σ = 64911450. Its totient is φ = 64911448.

The previous prime is 64911439. The next prime is 64911499. The reversal of 64911449 is 94411946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 9259849 = 7460^2 + 3043^2 .

It is a cyclic number.

It is not a de Polignac number, because 64911449 - 2⁴ = 64911433 is a prime.

It is a super-2 number, since 2×64911449² = 8426992422559202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64911439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32455724 + 32455725.

It is an arithmetic number, because the mean of its divisors is an integer number (32455725).

Almost surely, 2^64911449 is an apocalyptic number.

It is an amenable number.

64911449 is a deficient number, since it is larger than the sum of its proper divisors (1).

64911449 is an equidigital number, since it uses as much as digits as its factorization.

64911449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 64911449 is about 8056.7641767648. The cubic root of 64911449 is about 401.8899086336.

The spelling of 64911449 in words is "sixty-four million, nine hundred eleven thousand, four hundred forty-nine".