115391279 has 2 divisors, whose sum is σ = 115391280. Its totient is φ = 115391278.

The previous prime is 115391249. The next prime is 115391293. The reversal of 115391279 is 972193511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115391279 is a prime.

It is a Chen prime.

It is equal to p_6593717 and since 115391279 and 6593717 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115391239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57695639 + 57695640.

It is an arithmetic number, because the mean of its divisors is an integer number (57695640).

Almost surely, 2^115391279 is an apocalyptic number.

115391279 is a deficient number, since it is larger than the sum of its proper divisors (1).

115391279 is an equidigital number, since it uses as much as digits as its factorization.

115391279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 38.

The square root of 115391279 is about 10742.0332805293. The cubic root of 115391279 is about 486.8453157116.

The spelling of 115391279 in words is "one hundred fifteen million, three hundred ninety-one thousand, two hundred seventy-nine".