91006851 has 16 divisors (see below), whose sum is σ = 132894720. Its totient is φ = 55053600.

The previous prime is 91006849. The next prime is 91006871. The reversal of 91006851 is 15860019.

It is a happy number.

It is not a de Polignac number, because 91006851 - 2¹ = 91006849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91006801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17475 + ... + 22076.

It is an arithmetic number, because the mean of its divisors is an integer number (8305920).

Almost surely, 2^91006851 is an apocalyptic number.

91006851 is a deficient number, since it is larger than the sum of its proper divisors (41887869).

91006851 is a wasteful number, since it uses less digits than its factorization.

91006851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39626.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 91006851 is about 9539.7510973819. The cubic root of 91006851 is about 449.8054319354.

It can be divided in two parts, 9100 and 6851, that added together give a palindrome (15951).

The spelling of 91006851 in words is "ninety-one million, six thousand, eight hundred fifty-one".