91751705 has 4 divisors (see below), whose sum is σ = 110102052. Its totient is φ = 73401360.

The previous prime is 91751701. The next prime is 91751707. The reversal of 91751705 is 50715719.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67436944 + 24314761 = 8212^2 + 4931^2 .

It is not a de Polignac number, because 91751705 - 2² = 91751701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91751701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9175166 + ... + 9175175.

It is an arithmetic number, because the mean of its divisors is an integer number (27525513).

Almost surely, 2^91751705 is an apocalyptic number.

It is an amenable number.

91751705 is a deficient number, since it is larger than the sum of its proper divisors (18350347).

91751705 is a wasteful number, since it uses less digits than its factorization.

91751705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18350346.

The product of its (nonzero) digits is 11025, while the sum is 35.

The square root of 91751705 is about 9578.7110301961. The cubic root of 91751705 is about 451.0292572174.

The spelling of 91751705 in words is "ninety-one million, seven hundred fifty-one thousand, seven hundred five".