248764889 has 4 divisors (see below), whose sum is σ = 248845620. Its totient is φ = 248684160.

The previous prime is 248764877. The next prime is 248764907. The reversal of 248764889 is 988467842.

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 74736025 + 174028864 = 8645^2 + 13192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248764889 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 (248764819) 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, 35552 + ... + 41969.

It is an arithmetic number, because the mean of its divisors is an integer number (62211405).

Almost surely, 2^248764889 is an apocalyptic number.

It is an amenable number.

248764889 is a deficient number, since it is larger than the sum of its proper divisors (80731).

248764889 is an equidigital number, since it uses as much as digits as its factorization.

248764889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80730.

The product of its digits is 6193152, while the sum is 56.

The square root of 248764889 is about 15772.2823015567. The cubic root of 248764889 is about 628.9213835588.

It can be divided in two parts, 2487 and 64889, that added together give a palindrome (67376).

The spelling of 248764889 in words is "two hundred forty-eight million, seven hundred sixty-four thousand, eight hundred eighty-nine".