248781109 has 4 divisors (see below), whose sum is σ = 249372460. Its totient is φ = 248189760.

The previous prime is 248781103. The next prime is 248781121. The reversal of 248781109 is 901187842.

It is a happy number.

248781109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 624100 + 248157009 = 790^2 + 15753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248781109 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 (248781103) 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, 295044 + ... + 295885.

It is an arithmetic number, because the mean of its divisors is an integer number (62343115).

Almost surely, 2^248781109 is an apocalyptic number.

It is an amenable number.

248781109 is a deficient number, since it is larger than the sum of its proper divisors (591351).

248781109 is an equidigital number, since it uses as much as digits as its factorization.

248781109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591350.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 248781109 is about 15772.7964863559. The cubic root of 248781109 is about 628.9350522658.

The spelling of 248781109 in words is "two hundred forty-eight million, seven hundred eighty-one thousand, one hundred nine".