108391969 has 6 divisors (see below), whose sum is σ = 126088674. Its totient is φ = 92907360.

The previous prime is 108391957. The next prime is 108391991. The reversal of 108391969 is 969193801.

It can be written as a sum of positive squares in only one way, i.e., 98247744 + 10144225 = 9912^2 + 3185^2 .

It is not a de Polignac number, because 108391969 - 2⁹ = 108391457 is a prime.

It is a super-2 number, since 2×108391969² = 23497637887393922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108391999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105992 + ... + 1106089.

It is an arithmetic number, because the mean of its divisors is an integer number (21014779).

Almost surely, 2^108391969 is an apocalyptic number.

It is an amenable number.

108391969 is a deficient number, since it is larger than the sum of its proper divisors (17696705).

108391969 is an equidigital number, since it uses as much as digits as its factorization.

108391969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212095 (or 2212088 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 108391969 is about 10411.1463826036. The cubic root of 108391969 is about 476.7957422357.

The spelling of 108391969 in words is "one hundred eight million, three hundred ninety-one thousand, nine hundred sixty-nine".