248109449 has 4 divisors (see below), whose sum is σ = 283553664. Its totient is φ = 212665236.

The previous prime is 248109431. The next prime is 248109451. The reversal of 248109449 is 944901842.

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: 944901842 = 2 ⋅472450921.

It is not a de Polignac number, because 248109449 - 2²⁰ = 247060873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248109469) 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, 17722097 + ... + 17722110.

It is an arithmetic number, because the mean of its divisors is an integer number (70888416).

Almost surely, 2^248109449 is an apocalyptic number.

It is an amenable number.

248109449 is a deficient number, since it is larger than the sum of its proper divisors (35444215).

248109449 is an equidigital number, since it uses as much as digits as its factorization.

248109449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35444214.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 248109449 is about 15751.4903739297. The cubic root of 248109449 is about 628.3685418773.

The spelling of 248109449 in words is "two hundred forty-eight million, one hundred nine thousand, four hundred forty-nine".