91287125 has 8 divisors (see below), whose sum is σ = 113926488. Its totient is φ = 73029600.

The previous prime is 91287109. The next prime is 91287137. The reversal of 91287125 is 52178219.

It can be written as a sum of positive squares in 4 ways, for example, as 1094116 + 90193009 = 1046^2 + 9497^2 .

It is not a de Polignac number, because 91287125 - 2⁴ = 91287109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365024 + ... + 365273.

It is an arithmetic number, because the mean of its divisors is an integer number (14240811).

Almost surely, 2^91287125 is an apocalyptic number.

It is an amenable number.

91287125 is a deficient number, since it is larger than the sum of its proper divisors (22639363).

91287125 is an equidigital number, since it uses as much as digits as its factorization.

91287125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730312 (or 730302 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 91287125 is about 9554.4296009757. The cubic root of 91287125 is about 450.2667143156.

The spelling of 91287125 in words is "ninety-one million, two hundred eighty-seven thousand, one hundred twenty-five".