243431414389 has 2 divisors, whose sum is σ = 243431414390. Its totient is φ = 243431414388.

The previous prime is 243431414377. The next prime is 243431414419. The reversal of 243431414389 is 983414134342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243300495025 + 130919364 = 493255^2 + 11442^2 .

It is a cyclic number.

It is not a de Polignac number, because 243431414389 - 2¹⁷ = 243431283317 is a prime.

It is a super-2 number, since 2×243431414389² (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 (243432414389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121715707194 + 121715707195.

It is an arithmetic number, because the mean of its divisors is an integer number (121715707195).

Almost surely, 2^243431414389 is an apocalyptic number.

It is an amenable number.

243431414389 is a deficient number, since it is larger than the sum of its proper divisors (1).

243431414389 is an equidigital number, since it uses as much as digits as its factorization.

243431414389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 46.

The spelling of 243431414389 in words is "two hundred forty-three billion, four hundred thirty-one million, four hundred fourteen thousand, three hundred eighty-nine".