241991789 has 4 divisors (see below), whose sum is σ = 260606556. Its totient is φ = 223377024.

The previous prime is 241991779. The next prime is 241991833. The reversal of 241991789 is 987199142.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146773225 + 95218564 = 12115^2 + 9758^2 .

It is not a de Polignac number, because 241991789 - 2¹² = 241987693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241991749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9307364 + ... + 9307389.

It is an arithmetic number, because the mean of its divisors is an integer number (65151639).

Almost surely, 2^241991789 is an apocalyptic number.

It is an amenable number.

241991789 is a deficient number, since it is larger than the sum of its proper divisors (18614767).

241991789 is a wasteful number, since it uses less digits than its factorization.

241991789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18614766.

The product of its digits is 326592, while the sum is 50.

The square root of 241991789 is about 15556.0852723299. The cubic root of 241991789 is about 623.1609203790.

The spelling of 241991789 in words is "two hundred forty-one million, nine hundred ninety-one thousand, seven hundred eighty-nine".