243849077 has 2 divisors, whose sum is σ = 243849078. Its totient is φ = 243849076.

The previous prime is 243849043. The next prime is 243849107. The reversal of 243849077 is 770948342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229643716 + 14205361 = 15154^2 + 3769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243849077 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 (243849877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121924538 + 121924539.

It is an arithmetic number, because the mean of its divisors is an integer number (121924539).

Almost surely, 2^243849077 is an apocalyptic number.

It is an amenable number.

243849077 is a deficient number, since it is larger than the sum of its proper divisors (1).

243849077 is an equidigital number, since it uses as much as digits as its factorization.

243849077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 243849077 is about 15615.6676770479. The cubic root of 243849077 is about 624.7511132751.

It can be divided in two parts, 2438 and 49077, that added together give a palindrome (51515).

The spelling of 243849077 in words is "two hundred forty-three million, eight hundred forty-nine thousand, seventy-seven".