64194649 has 2 divisors, whose sum is σ = 64194650. Its totient is φ = 64194648.

The previous prime is 64194629. The next prime is 64194671. The reversal of 64194649 is 94649146.

64194649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63441225 + 753424 = 7965^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 64194649 - 2²³ = 55806041 is a prime.

It is not a weakly prime, because it can be changed into another prime (64194619) 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, 32097324 + 32097325.

It is an arithmetic number, because the mean of its divisors is an integer number (32097325).

Almost surely, 2^64194649 is an apocalyptic number.

It is an amenable number.

64194649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64194649 is an equidigital number, since it uses as much as digits as its factorization.

64194649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 64194649 is about 8012.1563264829. The cubic root of 64194649 is about 400.4051083296.

It can be divided in two parts, 64 and 194649, that multiplied together give a triangular number (12457536 = T₄₉₉₁).

The spelling of 64194649 in words is "sixty-four million, one hundred ninety-four thousand, six hundred forty-nine".