73585621 has 4 divisors (see below), whose sum is σ = 73730700. Its totient is φ = 73440544.

The previous prime is 73585609. The next prime is 73585643. The reversal of 73585621 is 12658537.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12658537 = 61 ⋅207517.

It can be written as a sum of positive squares in 2 ways, for example, as 68807025 + 4778596 = 8295^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 73585621 - 2⁷ = 73585493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73585601) 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, 71776 + ... + 72793.

It is an arithmetic number, because the mean of its divisors is an integer number (18432675).

Almost surely, 2^73585621 is an apocalyptic number.

It is an amenable number.

73585621 is a deficient number, since it is larger than the sum of its proper divisors (145079).

73585621 is a wasteful number, since it uses less digits than its factorization.

73585621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145078.

The product of its digits is 50400, while the sum is 37.

The square root of 73585621 is about 8578.2061644612. The cubic root of 73585621 is about 419.0485283171.

The spelling of 73585621 in words is "seventy-three million, five hundred eighty-five thousand, six hundred twenty-one".