73444457 has 2 divisors, whose sum is σ = 73444458. Its totient is φ = 73444456.

The previous prime is 73444453. The next prime is 73444477. The reversal of 73444457 is 75444437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46185616 + 27258841 = 6796^2 + 5221^2 .

It is an emirp because it is prime and its reverse (75444437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73444457 - 2² = 73444453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73444457.

It is not a weakly prime, because it can be changed into another prime (73444453) 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, 36722228 + 36722229.

It is an arithmetic number, because the mean of its divisors is an integer number (36722229).

Almost surely, 2^73444457 is an apocalyptic number.

It is an amenable number.

73444457 is a deficient number, since it is larger than the sum of its proper divisors (1).

73444457 is an equidigital number, since it uses as much as digits as its factorization.

73444457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 38.

The square root of 73444457 is about 8569.9741539867. The cubic root of 73444457 is about 418.7803942593.

The spelling of 73444457 in words is "seventy-three million, four hundred forty-four thousand, four hundred fifty-seven".