243423179677 has 2 divisors, whose sum is σ = 243423179678. Its totient is φ = 243423179676.

The previous prime is 243423179647. The next prime is 243423179687. The reversal of 243423179677 is 776971324342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241738405561 + 1684774116 = 491669^2 + 41046^2 .

It is a cyclic number.

It is not a de Polignac number, because 243423179677 - 2¹⁹ = 243422655389 is a prime.

It is a super-2 number, since 2×243423179677² (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 (243423179647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121711589838 + 121711589839.

It is an arithmetic number, because the mean of its divisors is an integer number (121711589839).

Almost surely, 2^243423179677 is an apocalyptic number.

It is an amenable number.

243423179677 is a deficient number, since it is larger than the sum of its proper divisors (1).

243423179677 is an equidigital number, since it uses as much as digits as its factorization.

243423179677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 55.

The spelling of 243423179677 in words is "two hundred forty-three billion, four hundred twenty-three million, one hundred seventy-nine thousand, six hundred seventy-seven".