109800621 has 18 divisors (see below), whose sum is σ = 184495662. Its totient is φ = 62742960.

The previous prime is 109800611. The next prime is 109800661. The reversal of 109800621 is 126008901.

It can be written as a sum of positive squares in only one way, i.e., 67420521 + 42380100 = 8211^2 + 6510^2 .

It is not a de Polignac number, because 109800621 - 2⁶ = 109800557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109800611) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 124050 + ... + 124931.

It is an arithmetic number, because the mean of its divisors is an integer number (10249759).

Almost surely, 2^109800621 is an apocalyptic number.

It is an amenable number.

109800621 is a deficient number, since it is larger than the sum of its proper divisors (74695041).

109800621 is a wasteful number, since it uses less digits than its factorization.

109800621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249001 (or 248991 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 109800621 is about 10478.5791498657. The cubic root of 109800621 is about 478.8523232036.

The spelling of 109800621 in words is "one hundred nine million, eight hundred thousand, six hundred twenty-one".