73439939 has 2 divisors, whose sum is σ = 73439940. Its totient is φ = 73439938.

The previous prime is 73439929. The next prime is 73439957. The reversal of 73439939 is 93993437.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73439939 - 2⁴ = 73439923 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 73439893 and 73439902.

It is not a weakly prime, because it can be changed into another prime (73439929) 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, 36719969 + 36719970.

It is an arithmetic number, because the mean of its divisors is an integer number (36719970).

Almost surely, 2^73439939 is an apocalyptic number.

73439939 is a deficient number, since it is larger than the sum of its proper divisors (1).

73439939 is an equidigital number, since it uses as much as digits as its factorization.

73439939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 47.

The square root of 73439939 is about 8569.7105552055. The cubic root of 73439939 is about 418.7718068691.

The spelling of 73439939 in words is "seventy-three million, four hundred thirty-nine thousand, nine hundred thirty-nine".