73378939 has 2 divisors, whose sum is σ = 73378940. Its totient is φ = 73378938.

The previous prime is 73378937. The next prime is 73378973. The reversal of 73378939 is 93987337.

It is a weak prime.

It is an emirp because it is prime and its reverse (93987337) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73378939 - 2¹ = 73378937 is a prime.

Together with 73378937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 73378892 and 73378901.

It is not a weakly prime, because it can be changed into another prime (73378933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36689469 + 36689470.

It is an arithmetic number, because the mean of its divisors is an integer number (36689470).

Almost surely, 2^73378939 is an apocalyptic number.

73378939 is a deficient number, since it is larger than the sum of its proper divisors (1).

73378939 is an equidigital number, since it uses as much as digits as its factorization.

73378939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 49.

The square root of 73378939 is about 8566.1507691611. The cubic root of 73378939 is about 418.6558293029.

The spelling of 73378939 in words is "seventy-three million, three hundred seventy-eight thousand, nine hundred thirty-nine".