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108168481 = 263411287

108168481 has 4 divisors (see below), whose sum is σ = 108580032. Its totient is φ = 107756932.

The previous prime is 108168469. The next prime is 108168491. The reversal of 108168481 is 184861801.

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: 184861801 = 586131541.

It is a cyclic number.

It is not a de Polignac number, because 108168481 - 223 = 99779873 is a prime.

It is a super-2 number, since 2×1081684812 = 23400840563694722, which contains 22 as substring.

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 108168481.

It is not an unprimeable number, because it can be changed into a prime (108168491) 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, 205381 + ... + 205906.

It is an arithmetic number, because the mean of its divisors is an integer number (27145008).

Almost surely, 2108168481 is an apocalyptic number.

It is an amenable number.

108168481 is a deficient number, since it is larger than the sum of its proper divisors (411551).

108168481 is an equidigital number, since it uses as much as digits as its factorization.

108168481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411550.

The product of its (nonzero) digits is 12288, while the sum is 37.

The square root of 108168481 is about 10400.4077323920. The cubic root of 108168481 is about 476.4678229644.

The spelling of 108168481 in words is "one hundred eight million, one hundred sixty-eight thousand, four hundred eighty-one".

Divisors: 1 263 411287 108168481