243961129 has 4 divisors (see below), whose sum is σ = 244071760. Its totient is φ = 243850500.

The previous prime is 243961097. The next prime is 243961139. The reversal of 243961129 is 921169342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 921169342 = 2 ⋅460584671.

It is a cyclic number.

It is not a de Polignac number, because 243961129 - 2⁵ = 243961097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243961139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51939 + ... + 56440.

It is an arithmetic number, because the mean of its divisors is an integer number (61017940).

Almost surely, 2^243961129 is an apocalyptic number.

It is an amenable number.

243961129 is a deficient number, since it is larger than the sum of its proper divisors (110631).

243961129 is a wasteful number, since it uses less digits than its factorization.

243961129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110630.

The product of its digits is 23328, while the sum is 37.

The square root of 243961129 is about 15619.2550718656. The cubic root of 243961129 is about 624.8467925270.

The spelling of 243961129 in words is "two hundred forty-three million, nine hundred sixty-one thousand, one hundred twenty-nine".