243248397 has 32 divisors (see below), whose sum is σ = 388512000. Its totient is φ = 135221184.

The previous prime is 243248387. The next prime is 243248399. The reversal of 243248397 is 793842342.

It is not a de Polignac number, because 243248397 - 2⁶ = 243248333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243248399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34879 + ... + 41267.

It is an arithmetic number, because the mean of its divisors is an integer number (12141000).

Almost surely, 2^243248397 is an apocalyptic number.

It is an amenable number.

243248397 is a deficient number, since it is larger than the sum of its proper divisors (145263603).

243248397 is an equidigital number, since it uses as much as digits as its factorization.

243248397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450 (or 6436 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 243248397 is about 15596.4225705769. The cubic root of 243248397 is about 624.2377027293.

The spelling of 243248397 in words is "two hundred forty-three million, two hundred forty-eight thousand, three hundred ninety-seven".