91073661 has 16 divisors (see below), whose sum is σ = 139014144. Its totient is φ = 51953904.

The previous prime is 91073603. The next prime is 91073677. The reversal of 91073661 is 16637019.

It is not a de Polignac number, because 91073661 - 2⁶ = 91073597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91073681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10236 + ... + 16938.

It is an arithmetic number, because the mean of its divisors is an integer number (8688384).

Almost surely, 2^91073661 is an apocalyptic number.

It is an amenable number.

91073661 is a deficient number, since it is larger than the sum of its proper divisors (47940483).

91073661 is a wasteful number, since it uses less digits than its factorization.

91073661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7360.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 91073661 is about 9543.2521186438. The cubic root of 91073661 is about 449.9154754826.

The spelling of 91073661 in words is "ninety-one million, seventy-three thousand, six hundred sixty-one".