91084977 has 12 divisors (see below), whose sum is σ = 133421184. Its totient is φ = 59867640.

The previous prime is 91084957. The next prime is 91085021. The reversal of 91084977 is 77948019.

It is not a de Polignac number, because 91084977 - 2¹⁹ = 90560689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91084937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70633 + ... + 71910.

It is an arithmetic number, because the mean of its divisors is an integer number (11118432).

Almost surely, 2^91084977 is an apocalyptic number.

It is an amenable number.

91084977 is a deficient number, since it is larger than the sum of its proper divisors (42336207).

91084977 is a wasteful number, since it uses less digits than its factorization.

91084977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142620 (or 142617 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 91084977 is about 9543.8449798810. The cubic root of 91084977 is about 449.9341088709.

The spelling of 91084977 in words is "ninety-one million, eighty-four thousand, nine hundred seventy-seven".