971117099 has 4 divisors (see below), whose sum is σ = 971213064. Its totient is φ = 971021136.

The previous prime is 971117087. The next prime is 971117111. The reversal of 971117099 is 990711179.

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: 990711179 = 1609 ⋅615731.

It is an interprime number because it is at equal distance from previous prime (971117087) and next prime (971117111).

It is a cyclic number.

It is not a de Polignac number, because 971117099 - 2⁴ = 971117083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971117699) 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, 30737 + ... + 53730.

It is an arithmetic number, because the mean of its divisors is an integer number (242803266).

Almost surely, 2^971117099 is an apocalyptic number.

971117099 is a deficient number, since it is larger than the sum of its proper divisors (95965).

971117099 is a wasteful number, since it uses less digits than its factorization.

971117099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95964.

The product of its (nonzero) digits is 35721, while the sum is 44.

The square root of 971117099 is about 31162.7517879920. The cubic root of 971117099 is about 990.2781584135.

The spelling of 971117099 in words is "nine hundred seventy-one million, one hundred seventeen thousand, ninety-nine".