115610991 has 8 divisors (see below), whose sum is σ = 162261120. Its totient is φ = 73017432.

The previous prime is 115610917. The next prime is 115611007. The reversal of 115610991 is 199016511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115610991 - 2⁹ = 115610479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115610291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014075 + ... + 1014188.

It is an arithmetic number, because the mean of its divisors is an integer number (20282640).

Almost surely, 2^115610991 is an apocalyptic number.

115610991 is a deficient number, since it is larger than the sum of its proper divisors (46650129).

115610991 is a wasteful number, since it uses less digits than its factorization.

115610991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028285.

The product of its (nonzero) digits is 2430, while the sum is 33.

The square root of 115610991 is about 10752.2551588027. The cubic root of 115610991 is about 487.1541141491.

The spelling of 115610991 in words is "one hundred fifteen million, six hundred ten thousand, nine hundred ninety-one".