91002003 has 8 divisors (see below), whose sum is σ = 128473488. Its totient is φ = 57099264.

The previous prime is 91001993. The next prime is 91002059. The reversal of 91002003 is 30020019.

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

It is not a de Polignac number, because 91002003 - 2⁸ = 91001747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91082003) 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, 892126 + ... + 892227.

It is an arithmetic number, because the mean of its divisors is an integer number (16059186).

Almost surely, 2^91002003 is an apocalyptic number.

91002003 is a deficient number, since it is larger than the sum of its proper divisors (37471485).

91002003 is a wasteful number, since it uses less digits than its factorization.

91002003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784373.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 91002003 is about 9539.4969993182. The cubic root of 91002003 is about 449.7974446413.

The spelling of 91002003 in words is "ninety-one million, two thousand, three".