91105412 has 6 divisors (see below), whose sum is σ = 159434478. Its totient is φ = 45552704.

The previous prime is 91105379. The next prime is 91105439. The reversal of 91105412 is 21450119.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57395776 + 33709636 = 7576^2 + 5806^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11388173 + ... + 11388180.

It is an arithmetic number, because the mean of its divisors is an integer number (26572413).

Almost surely, 2^91105412 is an apocalyptic number.

It is an amenable number.

91105412 is a deficient number, since it is larger than the sum of its proper divisors (68329066).

91105412 is a wasteful number, since it uses less digits than its factorization.

91105412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22776357 (or 22776355 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 91105412 is about 9544.9155051263. The cubic root of 91105412 is about 449.9677540680.

The spelling of 91105412 in words is "ninety-one million, one hundred five thousand, four hundred twelve".