971164643 has 4 divisors (see below), whose sum is σ = 971366448. Its totient is φ = 970962840.

The previous prime is 971164631. The next prime is 971164669. The reversal of 971164643 is 346461179.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971164643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 971164643.

It is not an unprimeable number, because it can be changed into a prime (971164343) 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, 93503 + ... + 103368.

It is an arithmetic number, because the mean of its divisors is an integer number (242841612).

Almost surely, 2^971164643 is an apocalyptic number.

971164643 is a deficient number, since it is larger than the sum of its proper divisors (201805).

971164643 is a wasteful number, since it uses less digits than its factorization.

971164643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201804.

The product of its digits is 108864, while the sum is 41.

The square root of 971164643 is about 31163.5146124438. The cubic root of 971164643 is about 990.2943188459.

The spelling of 971164643 in words is "nine hundred seventy-one million, one hundred sixty-four thousand, six hundred forty-three".