968398521 has 8 divisors (see below), whose sum is σ = 1326095424. Its totient is φ = 628150320.

The previous prime is 968398513. The next prime is 968398547. The reversal of 968398521 is 125893869.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 968398521 - 2³ = 968398513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (968398021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4362045 + ... + 4362266.

It is an arithmetic number, because the mean of its divisors is an integer number (165761928).

Almost surely, 2^968398521 is an apocalyptic number.

It is an amenable number.

968398521 is a deficient number, since it is larger than the sum of its proper divisors (357696903).

968398521 is a wasteful number, since it uses less digits than its factorization.

968398521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8724351.

The product of its digits is 933120, while the sum is 51.

The square root of 968398521 is about 31119.1021882059. The cubic root of 968398521 is about 989.3532220709.

The spelling of 968398521 in words is "nine hundred sixty-eight million, three hundred ninety-eight thousand, five hundred twenty-one".