91241505 has 16 divisors (see below), whose sum is σ = 162207360. Its totient is φ = 48662064.

The previous prime is 91241503. The next prime is 91241509. The reversal of 91241505 is 50514219.

It is not a de Polignac number, because 91241505 - 2¹ = 91241503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (91241503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337797 + ... + 338066.

It is an arithmetic number, because the mean of its divisors is an integer number (10137960).

Almost surely, 2^91241505 is an apocalyptic number.

It is an amenable number.

91241505 is a deficient number, since it is larger than the sum of its proper divisors (70965855).

91241505 is a wasteful number, since it uses less digits than its factorization.

91241505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675877 (or 675871 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 91241505 is about 9552.0419282999. The cubic root of 91241505 is about 450.1916961053.

The spelling of 91241505 in words is "ninety-one million, two hundred forty-one thousand, five hundred five".