91806125 has 12 divisors (see below), whose sum is σ = 114707892. Its totient is φ = 73359200.

The previous prime is 91806109. The next prime is 91806149. The reversal of 91806125 is 52160819.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 813604 + 90992521 = 902^2 + 9539^2 .

It is not a de Polignac number, because 91806125 - 2⁴ = 91806109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91806091 and 91806100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106697 + ... + 107553.

It is an arithmetic number, because the mean of its divisors is an integer number (9558991).

Almost surely, 2^91806125 is an apocalyptic number.

It is an amenable number.

91806125 is a deficient number, since it is larger than the sum of its proper divisors (22901767).

91806125 is an frugal number, since it uses more digits than its factorization.

91806125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 91806125 is about 9581.5512835866. The cubic root of 91806125 is about 451.1184114591.

The spelling of 91806125 in words is "ninety-one million, eight hundred six thousand, one hundred twenty-five".