91151705 has 8 divisors (see below), whose sum is σ = 115816392. Its totient is φ = 68631808.

The previous prime is 91151699. The next prime is 91151707. The reversal of 91151705 is 50715119.

It can be written as a sum of positive squares in 4 ways, for example, as 37847104 + 53304601 = 6152^2 + 7301^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91151705 - 2⁴ = 91151689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91151707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536102 + ... + 536271.

It is an arithmetic number, because the mean of its divisors is an integer number (14477049).

Almost surely, 2^91151705 is an apocalyptic number.

It is an amenable number.

91151705 is a deficient number, since it is larger than the sum of its proper divisors (24664687).

91151705 is a wasteful number, since it uses less digits than its factorization.

91151705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072395.

The product of its (nonzero) digits is 1575, while the sum is 29.

The square root of 91151705 is about 9547.3402055232. The cubic root of 91151705 is about 450.0439545543.

The spelling of 91151705 in words is "ninety-one million, one hundred fifty-one thousand, seven hundred five".