948405209 has 4 divisors (see below), whose sum is σ = 949275600. Its totient is φ = 947534820.

The previous prime is 948405113. The next prime is 948405221. The reversal of 948405209 is 902504849.

948405209 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, 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 948405209 - 2⁸ = 948404953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (948405229) 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, 433559 + ... + 435740.

It is an arithmetic number, because the mean of its divisors is an integer number (237318900).

Almost surely, 2^948405209 is an apocalyptic number.

It is an amenable number.

948405209 is a deficient number, since it is larger than the sum of its proper divisors (870391).

948405209 is a wasteful number, since it uses less digits than its factorization.

948405209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870390.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 948405209 is about 30796.1882219212. The cubic root of 948405209 is about 982.4971747659.

The spelling of 948405209 in words is "nine hundred forty-eight million, four hundred five thousand, two hundred nine".