73609621 has 8 divisors (see below), whose sum is σ = 74231384. Its totient is φ = 72990720.

The previous prime is 73609603. The next prime is 73609649. The reversal of 73609621 is 12690637.

It can be written as a sum of positive squares in 4 ways, for example, as 35343025 + 38266596 = 5945^2 + 6186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73609621 - 2⁵ = 73609589 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 (73609651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111031 + ... + 111691.

It is an arithmetic number, because the mean of its divisors is an integer number (9278923).

Almost surely, 2^73609621 is an apocalyptic number.

It is an amenable number.

73609621 is a deficient number, since it is larger than the sum of its proper divisors (621763).

73609621 is a wasteful number, since it uses less digits than its factorization.

73609621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 73609621 is about 8579.6049442850. The cubic root of 73609621 is about 419.0940810187.

The spelling of 73609621 in words is "seventy-three million, six hundred nine thousand, six hundred twenty-one".