243849407 has 2 divisors, whose sum is σ = 243849408. Its totient is φ = 243849406.

The previous prime is 243849383. The next prime is 243849413. The reversal of 243849407 is 704948342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243849407 - 2¹⁰ = 243848383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243849457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121924703 + 121924704.

It is an arithmetic number, because the mean of its divisors is an integer number (121924704).

Almost surely, 2^243849407 is an apocalyptic number.

243849407 is a deficient number, since it is larger than the sum of its proper divisors (1).

243849407 is an equidigital number, since it uses as much as digits as its factorization.

243849407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 243849407 is about 15615.6782433553. The cubic root of 243849407 is about 624.7513950994.

The spelling of 243849407 in words is "two hundred forty-three million, eight hundred forty-nine thousand, four hundred seven".