73983409 has 4 divisors (see below), whose sum is σ = 74716020. Its totient is φ = 73250800.

The previous prime is 73983347. The next prime is 73983419. The reversal of 73983409 is 90438937.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71571600 + 2411809 = 8460^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 73983409 - 2⁹ = 73982897 is a prime.

It is a super-2 number, since 2×73983409² = 10947089614522562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73983419) 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 3 ways as a sum of consecutive naturals, for example, 366154 + ... + 366355.

It is an arithmetic number, because the mean of its divisors is an integer number (18679005).

Almost surely, 2^73983409 is an apocalyptic number.

It is an amenable number.

73983409 is a deficient number, since it is larger than the sum of its proper divisors (732611).

73983409 is a wasteful number, since it uses less digits than its factorization.

73983409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732610.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 73983409 is about 8601.3608806979. The cubic root of 73983409 is about 419.8022670897.

It can be divided in two parts, 739 and 83409, that added together give a palindrome (84148).

The spelling of 73983409 in words is "seventy-three million, nine hundred eighty-three thousand, four hundred nine".