73444649 has 2 divisors, whose sum is σ = 73444650. Its totient is φ = 73444648.

The previous prime is 73444639. The next prime is 73444661. The reversal of 73444649 is 94644437.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 1194649 = 8500^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 73444649 - 2²⁴ = 56667433 is a prime.

It is not a weakly prime, because it can be changed into another prime (73444619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36722324 + 36722325.

It is an arithmetic number, because the mean of its divisors is an integer number (36722325).

Almost surely, 2^73444649 is an apocalyptic number.

It is an amenable number.

73444649 is a deficient number, since it is larger than the sum of its proper divisors (1).

73444649 is an equidigital number, since it uses as much as digits as its factorization.

73444649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 41.

The square root of 73444649 is about 8569.9853558801. The cubic root of 73444649 is about 418.7807591870.

The spelling of 73444649 in words is "seventy-three million, four hundred forty-four thousand, six hundred forty-nine".