115663949 has 4 divisors (see below), whose sum is σ = 115686780. Its totient is φ = 115641120.

The previous prime is 115663939. The next prime is 115663957. The reversal of 115663949 is 949366511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949366511 = 641 ⋅1481071.

It can be written as a sum of positive squares in 2 ways, for example, as 37429924 + 78234025 = 6118^2 + 8845^2 .

It is a cyclic number.

It is not a de Polignac number, because 115663949 - 2²⁰ = 114615373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115663939) 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, 32 + ... + 15209.

It is an arithmetic number, because the mean of its divisors is an integer number (28921695).

Almost surely, 2^115663949 is an apocalyptic number.

It is an amenable number.

115663949 is a deficient number, since it is larger than the sum of its proper divisors (22831).

115663949 is an equidigital number, since it uses as much as digits as its factorization.

115663949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22830.

The product of its digits is 174960, while the sum is 44.

The square root of 115663949 is about 10754.7175230222. The cubic root of 115663949 is about 487.2284864590.

The spelling of 115663949 in words is "one hundred fifteen million, six hundred sixty-three thousand, nine hundred forty-nine".