91825061 has 4 divisors (see below), whose sum is σ = 92410092. Its totient is φ = 91240032.

The previous prime is 91825057. The next prime is 91825079. The reversal of 91825061 is 16052819.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16052819 = 563 ⋅28513.

It can be written as a sum of positive squares in 2 ways, for example, as 65302561 + 26522500 = 8081^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 91825061 - 2² = 91825057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91825001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292280 + ... + 292593.

It is an arithmetic number, because the mean of its divisors is an integer number (23102523).

Almost surely, 2^91825061 is an apocalyptic number.

It is an amenable number.

91825061 is a deficient number, since it is larger than the sum of its proper divisors (585031).

91825061 is a wasteful number, since it uses less digits than its factorization.

91825061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585030.

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

The square root of 91825061 is about 9582.5393816044. The cubic root of 91825061 is about 451.1494253338.

The spelling of 91825061 in words is "ninety-one million, eight hundred twenty-five thousand, sixty-one".