242587911869 has 2 divisors, whose sum is σ = 242587911870. Its totient is φ = 242587911868.

The previous prime is 242587911847. The next prime is 242587911877. The reversal of 242587911869 is 968119785242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215981408644 + 26606503225 = 464738^2 + 163115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242587911869 is a prime.

It is a super-2 number, since 2×242587911869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242587911829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121293955934 + 121293955935.

It is an arithmetic number, because the mean of its divisors is an integer number (121293955935).

Almost surely, 2^242587911869 is an apocalyptic number.

It is an amenable number.

242587911869 is a deficient number, since it is larger than the sum of its proper divisors (1).

242587911869 is an equidigital number, since it uses as much as digits as its factorization.

242587911869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 62.

The spelling of 242587911869 in words is "two hundred forty-two billion, five hundred eighty-seven million, nine hundred eleven thousand, eight hundred sixty-nine".