91327129345 has 4 divisors (see below), whose sum is σ = 109592555220. Its totient is φ = 73061703472.

The previous prime is 91327129339. The next prime is 91327129351. The reversal of 91327129345 is 54392172319.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (91327129339) and next prime (91327129351).

It can be written as a sum of positive squares in 2 ways, for example, as 21613704256 + 69713425089 = 147016^2 + 264033^2 .

It is a cyclic number.

It is not a de Polignac number, because 91327129345 - 2³ = 91327129337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91327129295 and 91327129304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9132712930 + ... + 9132712939.

It is an arithmetic number, because the mean of its divisors is an integer number (27398138805).

Almost surely, 2^91327129345 is an apocalyptic number.

It is an amenable number.

91327129345 is a deficient number, since it is larger than the sum of its proper divisors (18265425875).

91327129345 is a wasteful number, since it uses less digits than its factorization.

91327129345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18265425874.

The product of its digits is 408240, while the sum is 46.

The spelling of 91327129345 in words is "ninety-one billion, three hundred twenty-seven million, one hundred twenty-nine thousand, three hundred forty-five".