109663553 has 4 divisors (see below), whose sum is σ = 110399700. Its totient is φ = 108927408.

The previous prime is 109663511. The next prime is 109663559. The reversal of 109663553 is 355366901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355366901 = 277 ⋅1282913.

It can be written as a sum of positive squares in 2 ways, for example, as 4129024 + 105534529 = 2032^2 + 10273^2 .

It is a cyclic number.

It is not a de Polignac number, because 109663553 - 2¹⁶ = 109598017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109663559) 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, 367850 + ... + 368147.

It is an arithmetic number, because the mean of its divisors is an integer number (27599925).

Almost surely, 2^109663553 is an apocalyptic number.

It is an amenable number.

109663553 is a deficient number, since it is larger than the sum of its proper divisors (736147).

109663553 is an equidigital number, since it uses as much as digits as its factorization.

109663553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736146.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 109663553 is about 10472.0367168951. The cubic root of 109663553 is about 478.6529841342.

The spelling of 109663553 in words is "one hundred nine million, six hundred sixty-three thousand, five hundred fifty-three".