73434409 has 16 divisors (see below), whose sum is σ = 78019200. Its totient is φ = 69013504.

The previous prime is 73434401. The next prime is 73434419. The reversal of 73434409 is 90443437.

It is not a de Polignac number, because 73434409 - 2³ = 73434401 is a prime.

It is a super-2 number, since 2×73434409² = 10785224850358562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73434401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285609 + ... + 285865.

It is an arithmetic number, because the mean of its divisors is an integer number (4876200).

Almost surely, 2^73434409 is an apocalyptic number.

It is an amenable number.

73434409 is a deficient number, since it is larger than the sum of its proper divisors (4584791).

73434409 is a wasteful number, since it uses less digits than its factorization.

73434409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 73434409 is about 8569.3879011281. The cubic root of 73434409 is about 418.7612954850.

Subtracting 73434409 from its reverse (90443437), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 73434409 in words is "seventy-three million, four hundred thirty-four thousand, four hundred nine".