109728641 has 4 divisors (see below), whose sum is σ = 119703984. Its totient is φ = 99753300.

The previous prime is 109728617. The next prime is 109728649. The reversal of 109728641 is 146827901.

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, and also an emirpimes, since its reverse is a distinct semiprime: 146827901 = 11 ⋅13347991.

It is a cyclic number.

It is not a de Polignac number, because 109728641 - 2¹⁰ = 109727617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109728595 and 109728604.

It is not an unprimeable number, because it can be changed into a prime (109728649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4987655 + ... + 4987676.

It is an arithmetic number, because the mean of its divisors is an integer number (29925996).

Almost surely, 2^109728641 is an apocalyptic number.

109728641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

109728641 is a deficient number, since it is larger than the sum of its proper divisors (9975343).

109728641 is an equidigital number, since it uses as much as digits as its factorization.

109728641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9975342.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 109728641 is about 10475.1439608246. The cubic root of 109728641 is about 478.7476628217.

The spelling of 109728641 in words is "one hundred nine million, seven hundred twenty-eight thousand, six hundred forty-one".