91005412 has 12 divisors (see below), whose sum is σ = 161870716. Its totient is φ = 44756640.

The previous prime is 91005407. The next prime is 91005419. The reversal of 91005412 is 21450019.

It can be written as a sum of positive squares in 2 ways, for example, as 9572836 + 81432576 = 3094^2 + 9024^2 .

It is not an unprimeable number, because it can be changed into a prime (91005419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186243 + ... + 186730.

Almost surely, 2^91005412 is an apocalyptic number.

It is an amenable number.

91005412 is a deficient number, since it is larger than the sum of its proper divisors (70865304).

91005412 is a wasteful number, since it uses less digits than its factorization.

91005412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373038 (or 373036 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 91005412 is about 9539.6756758288. The cubic root of 91005412 is about 449.8030611490.

The spelling of 91005412 in words is "ninety-one million, five thousand, four hundred twelve".