73421439 has 32 divisors (see below), whose sum is σ = 121465344. Its totient is φ = 38413440.

The previous prime is 73421437. The next prime is 73421441. The reversal of 73421439 is 93412437.

It is an interprime number because it is at equal distance from previous prime (73421437) and next prime (73421441).

It is not a de Polignac number, because 73421439 - 2¹ = 73421437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73421437) 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 in 31 ways as a sum of consecutive naturals, for example, 34737 + ... + 36789.

It is an arithmetic number, because the mean of its divisors is an integer number (3795792).

Almost surely, 2^73421439 is an apocalyptic number.

73421439 is a deficient number, since it is larger than the sum of its proper divisors (48043905).

73421439 is a wasteful number, since it uses less digits than its factorization.

73421439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207.

The product of its digits is 18144, while the sum is 33.

The square root of 73421439 is about 8568.6311042080. The cubic root of 73421439 is about 418.7366401322.

The spelling of 73421439 in words is "seventy-three million, four hundred twenty-one thousand, four hundred thirty-nine".