91312903 has 8 divisors (see below), whose sum is σ = 99889920. Its totient is φ = 82781880.

The previous prime is 91312901. The next prime is 91312919. The reversal of 91312903 is 30921319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91312903 - 2¹ = 91312901 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 (91312901) 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 7 ways as a sum of consecutive naturals, for example, 7273 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (12486240).

Almost surely, 2^91312903 is an apocalyptic number.

91312903 is a deficient number, since it is larger than the sum of its proper divisors (8577017).

91312903 is a wasteful number, since it uses less digits than its factorization.

91312903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22997.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 91312903 is about 9555.7785135488. The cubic root of 91312903 is about 450.3090929935.

The spelling of 91312903 in words is "ninety-one million, three hundred twelve thousand, nine hundred three".