243874987 has 2 divisors, whose sum is σ = 243874988. Its totient is φ = 243874986.

The previous prime is 243874951. The next prime is 243875069. The reversal of 243874987 is 789478342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243874987 - 2²³ = 235486379 is a prime.

It is not a weakly prime, because it can be changed into another prime (243874927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121937493 + 121937494.

It is an arithmetic number, because the mean of its divisors is an integer number (121937494).

Almost surely, 2^243874987 is an apocalyptic number.

243874987 is a deficient number, since it is larger than the sum of its proper divisors (1).

243874987 is an equidigital number, since it uses as much as digits as its factorization.

243874987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 52.

The square root of 243874987 is about 15616.4972705149. The cubic root of 243874987 is about 624.7732399778.

The spelling of 243874987 in words is "two hundred forty-three million, eight hundred seventy-four thousand, nine hundred eighty-seven".