91428575 has 12 divisors (see below), whose sum is σ = 129567600. Its totient is φ = 62693760.

The previous prime is 91428541. The next prime is 91428581. The reversal of 91428575 is 57582419.

It is not a de Polignac number, because 91428575 - 2⁶ = 91428511 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261050 + ... + 261399.

It is an arithmetic number, because the mean of its divisors is an integer number (10797300).

Almost surely, 2^91428575 is an apocalyptic number.

91428575 is a deficient number, since it is larger than the sum of its proper divisors (38139025).

91428575 is a wasteful number, since it uses less digits than its factorization.

91428575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522466 (or 522461 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 91428575 is about 9561.8290614296. The cubic root of 91428575 is about 450.4991580433.

The spelling of 91428575 in words is "ninety-one million, four hundred twenty-eight thousand, five hundred seventy-five".