240199409 has 4 divisors (see below), whose sum is σ = 254328804. Its totient is φ = 226070016.

The previous prime is 240199403. The next prime is 240199417. The reversal of 240199409 is 904991042.

It is a happy number.

240199409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 147501025 + 92698384 = 12145^2 + 9628^2 .

It is a cyclic number.

It is not a de Polignac number, because 240199409 - 2²⁴ = 223422193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240199403) 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, 7064672 + ... + 7064705.

It is an arithmetic number, because the mean of its divisors is an integer number (63582201).

Almost surely, 2^240199409 is an apocalyptic number.

It is an amenable number.

240199409 is a deficient number, since it is larger than the sum of its proper divisors (14129395).

240199409 is a wasteful number, since it uses less digits than its factorization.

240199409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14129394.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 240199409 is about 15498.3679463355. The cubic root of 240199409 is about 621.6185674687.

The spelling of 240199409 in words is "two hundred forty million, one hundred ninety-nine thousand, four hundred nine".