91513673 has 2 divisors, whose sum is σ = 91513674. Its totient is φ = 91513672.

The previous prime is 91513663. The next prime is 91513687. The reversal of 91513673 is 37631519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64192144 + 27321529 = 8012^2 + 5227^2 .

It is a cyclic number.

It is not a de Polignac number, because 91513673 - 2⁴ = 91513657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91513613) 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 as a sum of consecutive naturals, namely, 45756836 + 45756837.

It is an arithmetic number, because the mean of its divisors is an integer number (45756837).

Almost surely, 2^91513673 is an apocalyptic number.

It is an amenable number.

91513673 is a deficient number, since it is larger than the sum of its proper divisors (1).

91513673 is an equidigital number, since it uses as much as digits as its factorization.

91513673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 35.

The square root of 91513673 is about 9566.2779073159. The cubic root of 91513673 is about 450.6388834682.

The spelling of 91513673 in words is "ninety-one million, five hundred thirteen thousand, six hundred seventy-three".