109543931 has 4 divisors (see below), whose sum is σ = 125193072. Its totient is φ = 93894792.

The previous prime is 109543927. The next prime is 109543957. The reversal of 109543931 is 139345901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109543931 - 2² = 109543927 is a prime.

It is a super-2 number, since 2×109543931² = 23999745637865522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109543891 and 109543900.

It is not an unprimeable number, because it can be changed into a prime (109543921) 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, 7824560 + ... + 7824573.

It is an arithmetic number, because the mean of its divisors is an integer number (31298268).

Almost surely, 2^109543931 is an apocalyptic number.

109543931 is a deficient number, since it is larger than the sum of its proper divisors (15649141).

109543931 is an equidigital number, since it uses as much as digits as its factorization.

109543931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15649140.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 109543931 is about 10466.3236621079. The cubic root of 109543931 is about 478.4788811398.

The spelling of 109543931 in words is "one hundred nine million, five hundred forty-three thousand, nine hundred thirty-one".