248204309 has 4 divisors (see below), whose sum is σ = 249504000. Its totient is φ = 246904620.

The previous prime is 248204291. The next prime is 248204317. The reversal of 248204309 is 903402842.

248204309 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 248204309 - 2⁸ = 248204053 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 (248204329) 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, 649559 + ... + 649940.

It is an arithmetic number, because the mean of its divisors is an integer number (62376000).

Almost surely, 2^248204309 is an apocalyptic number.

It is an amenable number.

248204309 is a deficient number, since it is larger than the sum of its proper divisors (1299691).

248204309 is a wasteful number, since it uses less digits than its factorization.

248204309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299690.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 248204309 is about 15754.5012298073. The cubic root of 248204309 is about 628.4486133205.

The spelling of 248204309 in words is "two hundred forty-eight million, two hundred four thousand, three hundred nine".