240209953 has 4 divisors (see below), whose sum is σ = 250653888. Its totient is φ = 229766020.

The previous prime is 240209891. The next prime is 240210023. The reversal of 240209953 is 359902042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240209953 - 2¹³ = 240201761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240279953) 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, 5221933 + ... + 5221978.

It is an arithmetic number, because the mean of its divisors is an integer number (62663472).

Almost surely, 2^240209953 is an apocalyptic number.

240209953 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

240209953 is a deficient number, since it is larger than the sum of its proper divisors (10443935).

240209953 is a wasteful number, since it uses less digits than its factorization.

240209953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10443934.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 240209953 is about 15498.7081074521. The cubic root of 240209953 is about 621.6276630369.

The spelling of 240209953 in words is "two hundred forty million, two hundred nine thousand, nine hundred fifty-three".