240749539 has 4 divisors (see below), whose sum is σ = 243454680. Its totient is φ = 238044400.

The previous prime is 240749521. The next prime is 240749549. The reversal of 240749539 is 935947042.

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

It is a cyclic number.

It is not a de Polignac number, because 240749539 - 2⁵ = 240749507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240749495 and 240749504.

It is not an unprimeable number, because it can be changed into a prime (240749549) 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, 1352437 + ... + 1352614.

It is an arithmetic number, because the mean of its divisors is an integer number (60863670).

Almost surely, 2^240749539 is an apocalyptic number.

240749539 is a deficient number, since it is larger than the sum of its proper divisors (2705141).

240749539 is an equidigital number, since it uses as much as digits as its factorization.

240749539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705140.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 240749539 is about 15516.1057936584. The cubic root of 240749539 is about 622.0927710800.

The spelling of 240749539 in words is "two hundred forty million, seven hundred forty-nine thousand, five hundred thirty-nine".