243629489 has 2 divisors, whose sum is σ = 243629490. Its totient is φ = 243629488.

The previous prime is 243629483. The next prime is 243629563. The reversal of 243629489 is 984926342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241647025 + 1982464 = 15545^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 243629489 - 2²⁰ = 242580913 is a prime.

It is a super-2 number, since 2×243629489² = 118710655820802242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243629483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121814744 + 121814745.

It is an arithmetic number, because the mean of its divisors is an integer number (121814745).

Almost surely, 2^243629489 is an apocalyptic number.

It is an amenable number.

243629489 is a deficient number, since it is larger than the sum of its proper divisors (1).

243629489 is an equidigital number, since it uses as much as digits as its factorization.

243629489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The square root of 243629489 is about 15608.6350780586. The cubic root of 243629489 is about 624.5635258688.

The spelling of 243629489 in words is "two hundred forty-three million, six hundred twenty-nine thousand, four hundred eighty-nine".