248445965 has 4 divisors (see below), whose sum is σ = 298135164. Its totient is φ = 198756768.

The previous prime is 248445947. The next prime is 248445971. The reversal of 248445965 is 569544842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569544842 = 2 ⋅284772421.

It can be written as a sum of positive squares in 2 ways, for example, as 124858276 + 123587689 = 11174^2 + 11117^2 .

It is a cyclic number.

It is not a de Polignac number, because 248445965 - 2⁸ = 248445709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24844592 + ... + 24844601.

It is an arithmetic number, because the mean of its divisors is an integer number (74533791).

Almost surely, 2^248445965 is an apocalyptic number.

It is an amenable number.

248445965 is a deficient number, since it is larger than the sum of its proper divisors (49689199).

248445965 is an equidigital number, since it uses as much as digits as its factorization.

248445965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49689198.

The product of its digits is 1382400, while the sum is 47.

The square root of 248445965 is about 15762.1687911277. The cubic root of 248445965 is about 628.6525033041.

The spelling of 248445965 in words is "two hundred forty-eight million, four hundred forty-five thousand, nine hundred sixty-five".