91007705 has 16 divisors (see below), whose sum is σ = 110545344. Its totient is φ = 71922240.

The previous prime is 91007699. The next prime is 91007747. The reversal of 91007705 is 50770019.

It is not a de Polignac number, because 91007705 - 2⁴ = 91007689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205214 + ... + 205656.

It is an arithmetic number, because the mean of its divisors is an integer number (6909084).

Almost surely, 2^91007705 is an apocalyptic number.

It is an amenable number.

91007705 is a deficient number, since it is larger than the sum of its proper divisors (19537639).

91007705 is a wasteful number, since it uses less digits than its factorization.

91007705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

The product of its (nonzero) digits is 2205, while the sum is 29.

The square root of 91007705 is about 9539.7958573546. The cubic root of 91007705 is about 449.8068389088.

The spelling of 91007705 in words is "ninety-one million, seven thousand, seven hundred five".