109137921 has 8 divisors (see below), whose sum is σ = 151844160. Its totient is φ = 69595152.

The previous prime is 109137869. The next prime is 109137961. The reversal of 109137921 is 129731901.

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

It is not a de Polignac number, because 109137921 - 2⁶ = 109137857 is a prime.

It is a super-2 number, since 2×109137921² = 23822171600404482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109137961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790786 + ... + 790923.

It is an arithmetic number, because the mean of its divisors is an integer number (18980520).

Almost surely, 2^109137921 is an apocalyptic number.

It is an amenable number.

109137921 is a deficient number, since it is larger than the sum of its proper divisors (42706239).

109137921 is a wasteful number, since it uses less digits than its factorization.

109137921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581735.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 109137921 is about 10446.9096387401. The cubic root of 109137921 is about 477.8870098765.

The spelling of 109137921 in words is "one hundred nine million, one hundred thirty-seven thousand, nine hundred twenty-one".