91819325 has 24 divisors (see below), whose sum is σ = 123492096. Its totient is φ = 67320000.

The previous prime is 91819297. The next prime is 91819361. The reversal of 91819325 is 52391819.

It is not a de Polignac number, because 91819325 - 2¹⁰ = 91818301 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48140 + ... + 50010.

It is an arithmetic number, because the mean of its divisors is an integer number (5145504).

Almost surely, 2^91819325 is an apocalyptic number.

It is an amenable number.

91819325 is a deficient number, since it is larger than the sum of its proper divisors (31672771).

91819325 is a wasteful number, since it uses less digits than its factorization.

91819325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045 (or 2040 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 91819325 is about 9582.2400825694. The cubic root of 91819325 is about 451.1400312136.

The spelling of 91819325 in words is "ninety-one million, eight hundred nineteen thousand, three hundred twenty-five".