240738109 has 4 divisors (see below), whose sum is σ = 240771420. Its totient is φ = 240704800.

The previous prime is 240738083. The next prime is 240738143. The reversal of 240738109 is 901837042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 901837042 = 2 ⋅450918521.

It can be written as a sum of positive squares in 2 ways, for example, as 81902500 + 158835609 = 9050^2 + 12603^2 .

It is a cyclic number.

It is not a de Polignac number, because 240738109 - 2¹³ = 240729917 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 (240738149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754 + ... + 21955.

It is an arithmetic number, because the mean of its divisors is an integer number (60192855).

Almost surely, 2^240738109 is an apocalyptic number.

It is an amenable number.

240738109 is a deficient number, since it is larger than the sum of its proper divisors (33311).

240738109 is a wasteful number, since it uses less digits than its factorization.

240738109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33310.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 240738109 is about 15515.7374623316. The cubic root of 240738109 is about 622.0829259481.

The spelling of 240738109 in words is "two hundred forty million, seven hundred thirty-eight thousand, one hundred nine".