243112990 has 16 divisors (see below), whose sum is σ = 456630048. Its totient is φ = 93017056.

The previous prime is 243112979. The next prime is 243113009. The reversal of 243112990 is 99211342.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 528277 + ... + 528736.

It is an arithmetic number, because the mean of its divisors is an integer number (28539378).

Almost surely, 2^243112990 is an apocalyptic number.

243112990 is a deficient number, since it is larger than the sum of its proper divisors (213517058).

243112990 is a wasteful number, since it uses less digits than its factorization.

243112990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057043.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 243112990 is about 15592.0810028681. The cubic root of 243112990 is about 624.1218515463.

The spelling of 243112990 in words is "two hundred forty-three million, one hundred twelve thousand, nine hundred ninety".