115817869 has 2 divisors, whose sum is σ = 115817870. Its totient is φ = 115817868.

The previous prime is 115817861. The next prime is 115817887. The reversal of 115817869 is 968718511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82119844 + 33698025 = 9062^2 + 5805^2 .

It is an emirp because it is prime and its reverse (968718511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115817869 - 2³ = 115817861 is a prime.

It is a super-2 number, since 2×115817869² = 26827557559402322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115817861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57908934 + 57908935.

It is an arithmetic number, because the mean of its divisors is an integer number (57908935).

Almost surely, 2^115817869 is an apocalyptic number.

It is an amenable number.

115817869 is a deficient number, since it is larger than the sum of its proper divisors (1).

115817869 is an equidigital number, since it uses as much as digits as its factorization.

115817869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 46.

The square root of 115817869 is about 10761.8710733775. The cubic root of 115817869 is about 487.4445173763. Note that the first 3 decimals are identical.

The spelling of 115817869 in words is "one hundred fifteen million, eight hundred seventeen thousand, eight hundred sixty-nine".