248745643 has 8 divisors (see below), whose sum is σ = 258621440. Its totient is φ = 238985640.

The previous prime is 248745613. The next prime is 248745691. The reversal of 248745643 is 346547842.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248745643 is a prime.

It is a super-2 number, since 2×248745643² = 123748789822966898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 248745643.

It is not an unprimeable number, because it can be changed into a prime (248745613) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24555 + ... + 33172.

It is an arithmetic number, because the mean of its divisors is an integer number (32327680).

Almost surely, 2^248745643 is an apocalyptic number.

248745643 is a deficient number, since it is larger than the sum of its proper divisors (9875797).

248745643 is a wasteful number, since it uses less digits than its factorization.

248745643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57897.

The product of its digits is 645120, while the sum is 43.

The square root of 248745643 is about 15771.6721687968. The cubic root of 248745643 is about 628.9051640498.

The spelling of 248745643 in words is "two hundred forty-eight million, seven hundred forty-five thousand, six hundred forty-three".