966378197 has 4 divisors (see below), whose sum is σ = 966441036. Its totient is φ = 966315360.

The previous prime is 966378191. The next prime is 966378199. The reversal of 966378197 is 791873669.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 791873669 = 223 ⋅3551003.

It can be written as a sum of positive squares in 2 ways, for example, as 480881041 + 485497156 = 21929^2 + 22034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-966378197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966378191) 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, 8873 + ... + 44849.

It is an arithmetic number, because the mean of its divisors is an integer number (241610259).

Almost surely, 2^966378197 is an apocalyptic number.

It is an amenable number.

966378197 is a deficient number, since it is larger than the sum of its proper divisors (62839).

966378197 is a wasteful number, since it uses less digits than its factorization.

966378197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62838.

The product of its digits is 3429216, while the sum is 56.

The square root of 966378197 is about 31086.6240849662. The cubic root of 966378197 is about 988.6647294585.

The spelling of 966378197 in words is "nine hundred sixty-six million, three hundred seventy-eight thousand, one hundred ninety-seven".