915091 has 4 divisors (see below), whose sum is σ = 918000. Its totient is φ = 912184.

The previous prime is 915071. The next prime is 915113. The reversal of 915091 is 190519.

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

It is a cyclic number.

It is not a de Polignac number, because 915091 - 2⁹ = 914579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (915041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (229500).

2⁹¹⁵⁰⁹¹ is an apocalyptic number.

915091 is a deficient number, since it is larger than the sum of its proper divisors (2909).

915091 is a wasteful number, since it uses less digits than its factorization.

915091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 915091 is about 956.6038887648. The cubic root of 915091 is about 97.0855871241.

The spelling of 915091 in words is "nine hundred fifteen thousand, ninety-one".