91007087 has 16 divisors (see below), whose sum is σ = 97182720. Its totient is φ = 85098528.

The previous prime is 91007083. The next prime is 91007101. The reversal of 91007087 is 78070019.

It is a cyclic number.

It is not a de Polignac number, because 91007087 - 2² = 91007083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91007083) 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, 102158 + ... + 103044.

It is an arithmetic number, because the mean of its divisors is an integer number (6073920).

Almost surely, 2^91007087 is an apocalyptic number.

91007087 is a deficient number, since it is larger than the sum of its proper divisors (6175633).

91007087 is a wasteful number, since it uses less digits than its factorization.

91007087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 91007087 is about 9539.7634666694. The cubic root of 91007087 is about 449.8058207486.

The spelling of 91007087 in words is "ninety-one million, seven thousand, eighty-seven".