64354649 has 2 divisors, whose sum is σ = 64354650. Its totient is φ = 64354648.

The previous prime is 64354607. The next prime is 64354657. The reversal of 64354649 is 94645346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61905424 + 2449225 = 7868^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 64354649 - 2²⁰ = 63306073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64354679) 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, 32177324 + 32177325.

It is an arithmetic number, because the mean of its divisors is an integer number (32177325).

Almost surely, 2^64354649 is an apocalyptic number.

It is an amenable number.

64354649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64354649 is an equidigital number, since it uses as much as digits as its factorization.

64354649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 41.

The square root of 64354649 is about 8022.1349402762. The cubic root of 64354649 is about 400.7374915133.

The spelling of 64354649 in words is "sixty-four million, three hundred fifty-four thousand, six hundred forty-nine".