91751013 has 12 divisors (see below), whose sum is σ = 132812160. Its totient is φ = 61036776.

The previous prime is 91750993. The next prime is 91751017. The reversal of 91751013 is 31015719.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-91751013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91751017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6331 + ... + 14952.

It is an arithmetic number, because the mean of its divisors is an integer number (11067680).

Almost surely, 2^91751013 is an apocalyptic number.

It is an amenable number.

91751013 is a deficient number, since it is larger than the sum of its proper divisors (41061147).

91751013 is a wasteful number, since it uses less digits than its factorization.

91751013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21768 (or 21765 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 91751013 is about 9578.6749083576. The cubic root of 91751013 is about 451.0281233128.

The spelling of 91751013 in words is "ninety-one million, seven hundred fifty-one thousand, thirteen".