91827945 has 32 divisors (see below), whose sum is σ = 178093440. Its totient is φ = 44521920.

The previous prime is 91827943. The next prime is 91827971. The reversal of 91827945 is 54972819.

It is not a de Polignac number, because 91827945 - 2¹ = 91827943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91827945.

It is not an unprimeable number, because it can be changed into a prime (91827943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29434 + ... + 32403.

It is an arithmetic number, because the mean of its divisors is an integer number (5565420).

Almost surely, 2^91827945 is an apocalyptic number.

It is an amenable number.

91827945 is a deficient number, since it is larger than the sum of its proper divisors (86265495).

91827945 is a wasteful number, since it uses less digits than its factorization.

91827945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61862 (or 61856 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 91827945 is about 9582.6898624551. The cubic root of 91827945 is about 451.1541484501.

The spelling of 91827945 in words is "ninety-one million, eight hundred twenty-seven thousand, nine hundred forty-five".