968439809 has 4 divisors (see below), whose sum is σ = 968685504. Its totient is φ = 968194116.

The previous prime is 968439793. The next prime is 968439853. The reversal of 968439809 is 908934869.

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, and also an emirpimes, since its reverse is a distinct semiprime: 908934869 = 17 ⋅53466757.

It is a cyclic number.

It is not a de Polignac number, because 968439809 - 2⁴ = 968439793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (968439869) 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, 116837 + ... + 124850.

It is an arithmetic number, because the mean of its divisors is an integer number (242171376).

Almost surely, 2^968439809 is an apocalyptic number.

It is an amenable number.

968439809 is a deficient number, since it is larger than the sum of its proper divisors (245695).

968439809 is a wasteful number, since it uses less digits than its factorization.

968439809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245694.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 968439809 is about 31119.7655678831. The cubic root of 968439809 is about 989.3672823414.

The spelling of 968439809 in words is "nine hundred sixty-eight million, four hundred thirty-nine thousand, eight hundred nine".