78449053 has 2 divisors, whose sum is σ = 78449054. Its totient is φ = 78449052.

The previous prime is 78449051. The next prime is 78449087. The reversal of 78449053 is 35094487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76965529 + 1483524 = 8773^2 + 1218^2 .

It is an emirp because it is prime and its reverse (35094487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78449053 - 2¹ = 78449051 is a prime.

Together with 78449051, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 78448997 and 78449015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78449051) 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, 39224526 + 39224527.

It is an arithmetic number, because the mean of its divisors is an integer number (39224527).

Almost surely, 2^78449053 is an apocalyptic number.

It is an amenable number.

78449053 is a deficient number, since it is larger than the sum of its proper divisors (1).

78449053 is an equidigital number, since it uses as much as digits as its factorization.

78449053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 78449053 is about 8857.1470011511. The cubic root of 78449053 is about 428.0842356840.

The spelling of 78449053 in words is "seventy-eight million, four hundred forty-nine thousand, fifty-three".