115199779 has 2 divisors, whose sum is σ = 115199780. Its totient is φ = 115199778.

The previous prime is 115199753. The next prime is 115199783. The reversal of 115199779 is 977991511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115199779 - 2⁹ = 115199267 is a prime.

It is not a weakly prime, because it can be changed into another prime (115199719) 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, 57599889 + 57599890.

It is an arithmetic number, because the mean of its divisors is an integer number (57599890).

Almost surely, 2^115199779 is an apocalyptic number.

115199779 is a deficient number, since it is larger than the sum of its proper divisors (1).

115199779 is an equidigital number, since it uses as much as digits as its factorization.

115199779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 178605, while the sum is 49.

The square root of 115199779 is about 10733.1159967644. The cubic root of 115199779 is about 486.5758484960.

The spelling of 115199779 in words is "one hundred fifteen million, one hundred ninety-nine thousand, seven hundred seventy-nine".