243414989 has 2 divisors, whose sum is σ = 243414990. Its totient is φ = 243414988.

The previous prime is 243414961. The next prime is 243415019. The reversal of 243414989 is 989414342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173976100 + 69438889 = 13190^2 + 8333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243414989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243414289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121707494 + 121707495.

It is an arithmetic number, because the mean of its divisors is an integer number (121707495).

Almost surely, 2^243414989 is an apocalyptic number.

It is an amenable number.

243414989 is a deficient number, since it is larger than the sum of its proper divisors (1).

243414989 is an equidigital number, since it uses as much as digits as its factorization.

243414989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 243414989 is about 15601.7623683993. The cubic root of 243414989 is about 624.3801761259.

The spelling of 243414989 in words is "two hundred forty-three million, four hundred fourteen thousand, nine hundred eighty-nine".