968191817 has 4 divisors (see below), whose sum is σ = 984063876. Its totient is φ = 952319760.

The previous prime is 968191813. The next prime is 968191843. The reversal of 968191817 is 718191869.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 718191869 = 1709 ⋅420241.

It can be written as a sum of positive squares in 2 ways, for example, as 418570681 + 549621136 = 20459^2 + 23444^2 .

It is a cyclic number.

It is not a de Polignac number, because 968191817 - 2² = 968191813 is a prime.

It is a super-2 number, since 2×968191817² = 1874790789011522978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (968191811) 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, 7935938 + ... + 7936059.

It is an arithmetic number, because the mean of its divisors is an integer number (246015969).

Almost surely, 2^968191817 is an apocalyptic number.

It is an amenable number.

968191817 is a deficient number, since it is larger than the sum of its proper divisors (15872059).

968191817 is a wasteful number, since it uses less digits than its factorization.

968191817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872058.

The product of its digits is 217728, while the sum is 50.

The square root of 968191817 is about 31115.7808354539. The cubic root of 968191817 is about 989.2828248064.

The spelling of 968191817 in words is "nine hundred sixty-eight million, one hundred ninety-one thousand, eight hundred seventeen".