91011373 has 2 divisors, whose sum is σ = 91011374. Its totient is φ = 91011372.

The previous prime is 91011341. The next prime is 91011383. The reversal of 91011373 is 37311019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89056969 + 1954404 = 9437^2 + 1398^2 .

It is an emirp because it is prime and its reverse (37311019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91011373 - 2⁵ = 91011341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91011313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45505686 + 45505687.

It is an arithmetic number, because the mean of its divisors is an integer number (45505687).

Almost surely, 2^91011373 is an apocalyptic number.

It is an amenable number.

91011373 is a deficient number, since it is larger than the sum of its proper divisors (1).

91011373 is an equidigital number, since it uses as much as digits as its factorization.

91011373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 91011373 is about 9539.9881027179. The cubic root of 91011373 is about 449.8128818745.

The spelling of 91011373 in words is "ninety-one million, eleven thousand, three hundred seventy-three".