243229977 has 12 divisors (see below), whose sum is σ = 351549744. Its totient is φ = 162052920.

The previous prime is 243229967. The next prime is 243229981. The reversal of 243229977 is 779922342.

It is not a de Polignac number, because 243229977 - 2⁶ = 243229913 is a prime.

It is a super-2 number, since 2×243229977² = 118321643422841058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243229957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8838 + ... + 23760.

It is an arithmetic number, because the mean of its divisors is an integer number (29295812).

Almost surely, 2^243229977 is an apocalyptic number.

It is an amenable number.

243229977 is a deficient number, since it is larger than the sum of its proper divisors (108319767).

243229977 is a wasteful number, since it uses less digits than its factorization.

243229977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16740 (or 16737 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 243229977 is about 15595.8320393623. The cubic root of 243229977 is about 624.2219455186.

The spelling of 243229977 in words is "two hundred forty-three million, two hundred twenty-nine thousand, nine hundred seventy-seven".