243433013977 has 2 divisors, whose sum is σ = 243433013978. Its totient is φ = 243433013976.

The previous prime is 243433013951. The next prime is 243433014029. The reversal of 243433013977 is 779310334342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180798441616 + 62634572361 = 425204^2 + 250269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243433013977 is a prime.

It is not a weakly prime, because it can be changed into another prime (243433013477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121716506988 + 121716506989.

It is an arithmetic number, because the mean of its divisors is an integer number (121716506989).

Almost surely, 2^243433013977 is an apocalyptic number.

It is an amenable number.

243433013977 is a deficient number, since it is larger than the sum of its proper divisors (1).

243433013977 is an equidigital number, since it uses as much as digits as its factorization.

243433013977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 46.

The spelling of 243433013977 in words is "two hundred forty-three billion, four hundred thirty-three million, thirteen thousand, nine hundred seventy-seven".