91230903 has 24 divisors (see below), whose sum is σ = 138554208. Its totient is φ = 57733632.

The previous prime is 91230877. The next prime is 91230961. The reversal of 91230903 is 30903219.

It is not a de Polignac number, because 91230903 - 2⁵ = 91230871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91230803) 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 23 ways as a sum of consecutive naturals, for example, 26751 + ... + 29967.

It is an arithmetic number, because the mean of its divisors is an integer number (5773092).

Almost surely, 2^91230903 is an apocalyptic number.

91230903 is a deficient number, since it is larger than the sum of its proper divisors (47323305).

91230903 is a wasteful number, since it uses less digits than its factorization.

91230903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383 (or 3380 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 91230903 is about 9551.4869523022. The cubic root of 91230903 is about 450.1742584372.

The spelling of 91230903 in words is "ninety-one million, two hundred thirty thousand, nine hundred three".