971717961 has 16 divisors (see below), whose sum is σ = 1354199040. Its totient is φ = 618618000.

The previous prime is 971717959. The next prime is 971717963. The reversal of 971717961 is 169717179.

It is an interprime number because it is at equal distance from previous prime (971717959) and next prime (971717963).

It is not a de Polignac number, because 971717961 - 2¹ = 971717959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 971717961.

It is not an unprimeable number, because it can be changed into a prime (971717963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31336 + ... + 54086.

It is an arithmetic number, because the mean of its divisors is an integer number (84637440).

Almost surely, 2^971717961 is an apocalyptic number.

It is an amenable number.

971717961 is a deficient number, since it is larger than the sum of its proper divisors (382481079).

971717961 is a wasteful number, since it uses less digits than its factorization.

971717961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23396.

The product of its digits is 166698, while the sum is 48.

The square root of 971717961 is about 31172.3910055036. The cubic root of 971717961 is about 990.4823554968.

The spelling of 971717961 in words is "nine hundred seventy-one million, seven hundred seventeen thousand, nine hundred sixty-one".