64236649 has 2 divisors, whose sum is σ = 64236650. Its totient is φ = 64236648.

The previous prime is 64236637. The next prime is 64236661. The reversal of 64236649 is 94663246.

64236649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (64236637) and next prime (64236661).

It can be written as a sum of positive squares in only one way, i.e., 60840000 + 3396649 = 7800^2 + 1843^2 .

It is a cyclic number.

It is not a de Polignac number, because 64236649 - 2¹¹ = 64234601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64231649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32118324 + 32118325.

It is an arithmetic number, because the mean of its divisors is an integer number (32118325).

Almost surely, 2^64236649 is an apocalyptic number.

It is an amenable number.

64236649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64236649 is an equidigital number, since it uses as much as digits as its factorization.

64236649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 40.

The square root of 64236649 is about 8014.7769151736. The cubic root of 64236649 is about 400.4924123265.

The spelling of 64236649 in words is "sixty-four million, two hundred thirty-six thousand, six hundred forty-nine".