91409055 has 16 divisors (see below), whose sum is σ = 150208224. Its totient is φ = 47433600.

The previous prime is 91409039. The next prime is 91409077. The reversal of 91409055 is 55090419.

It is not a de Polignac number, because 91409055 - 2⁴ = 91409039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81796 + ... + 82905.

It is an arithmetic number, because the mean of its divisors is an integer number (9388014).

Almost surely, 2^91409055 is an apocalyptic number.

91409055 is a deficient number, since it is larger than the sum of its proper divisors (58799169).

91409055 is a wasteful number, since it uses less digits than its factorization.

91409055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164746.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 91409055 is about 9560.8082817302. The cubic root of 91409055 is about 450.4670952392.

The spelling of 91409055 in words is "ninety-one million, four hundred nine thousand, fifty-five".