91320461 has 4 divisors (see below), whose sum is σ = 91933500. Its totient is φ = 90707424.

The previous prime is 91320371. The next prime is 91320469. The reversal of 91320461 is 16402319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16402319 = 223 ⋅73553.

It can be written as a sum of positive squares in 2 ways, for example, as 53743561 + 37576900 = 7331^2 + 6130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91320461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91320461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91320469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306296 + ... + 306593.

It is an arithmetic number, because the mean of its divisors is an integer number (22983375).

Almost surely, 2^91320461 is an apocalyptic number.

It is an amenable number.

91320461 is a deficient number, since it is larger than the sum of its proper divisors (613039).

91320461 is a wasteful number, since it uses less digits than its factorization.

91320461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613038.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 91320461 is about 9556.1739728827. The cubic root of 91320461 is about 450.3215167296.

The spelling of 91320461 in words is "ninety-one million, three hundred twenty thousand, four hundred sixty-one".