73853009 has 4 divisors (see below), whose sum is σ = 75246516. Its totient is φ = 72459504.

The previous prime is 73852991. The next prime is 73853033. The reversal of 73853009 is 90035837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90035837 = 37 ⋅2433401.

It can be written as a sum of positive squares in 2 ways, for example, as 36300625 + 37552384 = 6025^2 + 6128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73853009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73853009.

It is not an unprimeable number, because it can be changed into a prime (73853089) 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, 696674 + ... + 696779.

It is an arithmetic number, because the mean of its divisors is an integer number (18811629).

Almost surely, 2^73853009 is an apocalyptic number.

It is an amenable number.

73853009 is a deficient number, since it is larger than the sum of its proper divisors (1393507).

73853009 is a wasteful number, since it uses less digits than its factorization.

73853009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393506.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 73853009 is about 8593.7773417747. Note that the first 3 decimals coincide. The cubic root of 73853009 is about 419.5554801862. Note that the first 3 decimals are identical.

The spelling of 73853009 in words is "seventy-three million, eight hundred fifty-three thousand, nine".