240013649 has 4 divisors (see below), whose sum is σ = 240058164. Its totient is φ = 239969136.

The previous prime is 240013637. The next prime is 240013661. The reversal of 240013649 is 946310042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946310042 = 2 ⋅473155021.

It is an interprime number because it is at equal distance from previous prime (240013637) and next prime (240013661).

It can be written as a sum of positive squares in 2 ways, for example, as 191961025 + 48052624 = 13855^2 + 6932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240013649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240013619) 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, 12842 + ... + 25395.

It is an arithmetic number, because the mean of its divisors is an integer number (60014541).

Almost surely, 2^240013649 is an apocalyptic number.

It is an amenable number.

240013649 is a deficient number, since it is larger than the sum of its proper divisors (44515).

240013649 is an equidigital number, since it uses as much as digits as its factorization.

240013649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44514.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 240013649 is about 15492.3738981474. The cubic root of 240013649 is about 621.4582816943.

The spelling of 240013649 in words is "two hundred forty million, thirteen thousand, six hundred forty-nine".