73738409 has 2 divisors, whose sum is σ = 73738410. Its totient is φ = 73738408.

The previous prime is 73738361. The next prime is 73738433. The reversal of 73738409 is 90483737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46280809 + 27457600 = 6803^2 + 5240^2 .

It is a cyclic number.

It is not a de Polignac number, because 73738409 - 2²⁴ = 56961193 is a prime.

It is not a weakly prime, because it can be changed into another prime (73738109) 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, 36869204 + 36869205.

It is an arithmetic number, because the mean of its divisors is an integer number (36869205).

Almost surely, 2^73738409 is an apocalyptic number.

It is an amenable number.

73738409 is a deficient number, since it is larger than the sum of its proper divisors (1).

73738409 is an equidigital number, since it uses as much as digits as its factorization.

73738409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 73738409 is about 8587.1071380297. The cubic root of 73738409 is about 419.3383554327.

It can be divided in two parts, 73738 and 409, that added together give a palindrome (74147).

The spelling of 73738409 in words is "seventy-three million, seven hundred thirty-eight thousand, four hundred nine".