73002409 has 4 divisors (see below), whose sum is σ = 74002516. Its totient is φ = 72002304.

The previous prime is 73002353. The next prime is 73002467. The reversal of 73002409 is 90420037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90420037 = 59 ⋅1532543.

It can be written as a sum of positive squares in 2 ways, for example, as 36966400 + 36036009 = 6080^2 + 6003^2 .

It is a cyclic number.

It is not a de Polignac number, because 73002409 - 2¹³ = 72994217 is a prime.

It is a Duffinian number.

73002409 is a modest number, since divided by 2409 gives 73 as remainder.

It is not an unprimeable number, because it can be changed into a prime (73002469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499944 + ... + 500089.

It is an arithmetic number, because the mean of its divisors is an integer number (18500629).

Almost surely, 2^73002409 is an apocalyptic number.

It is an amenable number.

73002409 is a deficient number, since it is larger than the sum of its proper divisors (1000107).

73002409 is a wasteful number, since it uses less digits than its factorization.

73002409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000106.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 73002409 is about 8544.1447202163. The cubic root of 73002409 is about 417.9385168607.

The spelling of 73002409 in words is "seventy-three million, two thousand, four hundred nine".