109873521 has 6 divisors (see below), whose sum is σ = 158706210. Its totient is φ = 73249008.

The previous prime is 109873487. The next prime is 109873559. The reversal of 109873521 is 125378901.

It can be written as a sum of positive squares in only one way, i.e., 109495296 + 378225 = 10464^2 + 615^2 .

It is not a de Polignac number, because 109873521 - 2²³ = 101484913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109873321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6104076 + ... + 6104093.

It is an arithmetic number, because the mean of its divisors is an integer number (26451035).

Almost surely, 2^109873521 is an apocalyptic number.

It is an amenable number.

109873521 is a deficient number, since it is larger than the sum of its proper divisors (48832689).

109873521 is a wasteful number, since it uses less digits than its factorization.

109873521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12208175 (or 12208172 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 109873521 is about 10482.0570977266. The cubic root of 109873521 is about 478.9582746737.

The spelling of 109873521 in words is "one hundred nine million, eight hundred seventy-three thousand, five hundred twenty-one".