248888639 has 4 divisors (see below), whose sum is σ = 248928024. Its totient is φ = 248849256.

The previous prime is 248888621. The next prime is 248888663. The reversal of 248888639 is 936888842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936888842 = 2 ⋅468444421.

It is a cyclic number.

It is not a de Polignac number, because 248888639 - 2⁸ = 248888383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248888669) 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, 7832 + ... + 23645.

It is an arithmetic number, because the mean of its divisors is an integer number (62232006).

Almost surely, 2^248888639 is an apocalyptic number.

248888639 is a deficient number, since it is larger than the sum of its proper divisors (39385).

248888639 is an equidigital number, since it uses as much as digits as its factorization.

248888639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39384.

The product of its digits is 5308416, while the sum is 56.

The square root of 248888639 is about 15776.2048351307. The cubic root of 248888639 is about 629.0256535244.

The spelling of 248888639 in words is "two hundred forty-eight million, eight hundred eighty-eight thousand, six hundred thirty-nine".