971278163 has 4 divisors (see below), whose sum is σ = 985774920. Its totient is φ = 956781408.

The previous prime is 971278141. The next prime is 971278177. The reversal of 971278163 is 361872179.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 971278163 - 2⁸ = 971277907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971278193) 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, 7248278 + ... + 7248411.

It is an arithmetic number, because the mean of its divisors is an integer number (246443730).

Almost surely, 2^971278163 is an apocalyptic number.

971278163 is a deficient number, since it is larger than the sum of its proper divisors (14496757).

971278163 is a wasteful number, since it uses less digits than its factorization.

971278163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14496756.

The product of its digits is 127008, while the sum is 44.

The square root of 971278163 is about 31165.3359198966. The cubic root of 971278163 is about 990.3329027022.

The spelling of 971278163 in words is "nine hundred seventy-one million, two hundred seventy-eight thousand, one hundred sixty-three".