243093987 has 32 divisors (see below), whose sum is σ = 368919360. Its totient is φ = 158146560.

The previous prime is 243093941. The next prime is 243094001. The reversal of 243093987 is 789390342.

It is a happy number.

It is not a de Polignac number, because 243093987 - 2¹¹ = 243091939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243093787) 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 31 ways as a sum of consecutive naturals, for example, 367437 + ... + 368097.

It is an arithmetic number, because the mean of its divisors is an integer number (11528730).

Almost surely, 2^243093987 is an apocalyptic number.

243093987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

243093987 is a deficient number, since it is larger than the sum of its proper divisors (125825373).

243093987 is a wasteful number, since it uses less digits than its factorization.

243093987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 243093987 is about 15591.4716111084. The cubic root of 243093987 is about 624.1055895652.

The spelling of 243093987 in words is "two hundred forty-three million, ninety-three thousand, nine hundred eighty-seven".