115820971 has 4 divisors (see below), whose sum is σ = 132366832. Its totient is φ = 99275112.

The previous prime is 115820963. The next prime is 115820981. The reversal of 115820971 is 179028511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179028511 = 251 ⋅713261.

It is a cyclic number.

It is not a de Polignac number, because 115820971 - 2³ = 115820963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115820911) 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, 8272920 + ... + 8272933.

It is an arithmetic number, because the mean of its divisors is an integer number (33091708).

Almost surely, 2^115820971 is an apocalyptic number.

115820971 is a deficient number, since it is larger than the sum of its proper divisors (16545861).

115820971 is an equidigital number, since it uses as much as digits as its factorization.

115820971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16545860.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 115820971 is about 10762.0151923327. The cubic root of 115820971 is about 487.4488691498.

The spelling of 115820971 in words is "one hundred fifteen million, eight hundred twenty thousand, nine hundred seventy-one".