243190138989 has 48 divisors (see below), whose sum is σ = 385263423168. Its totient is φ = 136018891008.

The previous prime is 243190138973. The next prime is 243190139011. The reversal of 243190138989 is 989831091342.

It is not a de Polignac number, because 243190138989 - 2⁴ = 243190138973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243190138189) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1467657 + ... + 1624929.

It is an arithmetic number, because the mean of its divisors is an integer number (8026321316).

Almost surely, 2^243190138989 is an apocalyptic number.

It is an amenable number.

243190138989 is a deficient number, since it is larger than the sum of its proper divisors (142073284179).

243190138989 is a wasteful number, since it uses less digits than its factorization.

243190138989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157514 (or 157507 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 243190138989 in words is "two hundred forty-three billion, one hundred ninety million, one hundred thirty-eight thousand, nine hundred eighty-nine".