115305749 has 4 divisors (see below), whose sum is σ = 124175436. Its totient is φ = 106436064.

The previous prime is 115305691. The next prime is 115305797. The reversal of 115305749 is 947503511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27227524 + 88078225 = 5218^2 + 9385^2 .

It is a cyclic number.

It is not a de Polignac number, because 115305749 - 2²⁴ = 98528533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115305649) 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 in 3 ways as a sum of consecutive naturals, for example, 4434824 + ... + 4434849.

It is an arithmetic number, because the mean of its divisors is an integer number (31043859).

Almost surely, 2^115305749 is an apocalyptic number.

It is an amenable number.

115305749 is a deficient number, since it is larger than the sum of its proper divisors (8869687).

115305749 is an equidigital number, since it uses as much as digits as its factorization.

115305749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8869686.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 115305749 is about 10738.0514526612. The cubic root of 115305749 is about 486.7249999404.

The spelling of 115305749 in words is "one hundred fifteen million, three hundred five thousand, seven hundred forty-nine".