109629921 has 4 divisors (see below), whose sum is σ = 146173232. Its totient is φ = 73086612.

The previous prime is 109629913. The next prime is 109629967. The reversal of 109629921 is 129926901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 109629921 - 2³ = 109629913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109629921.

It is not an unprimeable number, because it can be changed into a prime (109629901) 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, 18271651 + ... + 18271656.

It is an arithmetic number, because the mean of its divisors is an integer number (36543308).

Almost surely, 2^109629921 is an apocalyptic number.

It is an amenable number.

109629921 is a deficient number, since it is larger than the sum of its proper divisors (36543311).

109629921 is an equidigital number, since it uses as much as digits as its factorization.

109629921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36543310.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 109629921 is about 10470.4307934297. The cubic root of 109629921 is about 478.6040474770.

The spelling of 109629921 in words is "one hundred nine million, six hundred twenty-nine thousand, nine hundred twenty-one".