108428249 has 4 divisors (see below), whose sum is σ = 109546164. Its totient is φ = 107310336.

The previous prime is 108428143. The next prime is 108428263. The reversal of 108428249 is 942824801.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71910400 + 36517849 = 8480^2 + 6043^2 .

It is a cyclic number.

It is not a de Polignac number, because 108428249 - 2²⁴ = 91651033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (108421249) 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, 558812 + ... + 559005.

It is an arithmetic number, because the mean of its divisors is an integer number (27386541).

Almost surely, 2^108428249 is an apocalyptic number.

It is an amenable number.

108428249 is a deficient number, since it is larger than the sum of its proper divisors (1117915).

108428249 is an equidigital number, since it uses as much as digits as its factorization.

108428249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117914.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 108428249 is about 10412.8886001916. Note that the first 3 decimals coincide. The cubic root of 108428249 is about 476.8489325845.

It can be divided in two parts, 10842 and 8249, that added together give a palindrome (19091).

The spelling of 108428249 in words is "one hundred eight million, four hundred twenty-eight thousand, two hundred forty-nine".