91373903 has 4 divisors (see below), whose sum is σ = 92316000. Its totient is φ = 90431808.

The previous prime is 91373879. The next prime is 91373921. The reversal of 91373903 is 30937319.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91373903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91376903) 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, 470903 + ... + 471096.

It is an arithmetic number, because the mean of its divisors is an integer number (23079000).

Almost surely, 2^91373903 is an apocalyptic number.

91373903 is a deficient number, since it is larger than the sum of its proper divisors (942097).

91373903 is an equidigital number, since it uses as much as digits as its factorization.

91373903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942096.

The product of its (nonzero) digits is 15309, while the sum is 35.

The square root of 91373903 is about 9558.9697666642. The cubic root of 91373903 is about 450.4093443977.

The spelling of 91373903 in words is "ninety-one million, three hundred seventy-three thousand, nine hundred three".