91102003 has 2 divisors, whose sum is σ = 91102004. Its totient is φ = 91102002.

The previous prime is 91101971. The next prime is 91102009. The reversal of 91102003 is 30020119.

It is a strong prime.

It is an emirp because it is prime and its reverse (30020119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91102003 - 2⁵ = 91101971 is a prime.

It is a super-2 number, since 2×91102003² = 16599149901224018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91102009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45551001 + 45551002.

It is an arithmetic number, because the mean of its divisors is an integer number (45551002).

Almost surely, 2^91102003 is an apocalyptic number.

91102003 is a deficient number, since it is larger than the sum of its proper divisors (1).

91102003 is an equidigital number, since it uses as much as digits as its factorization.

91102003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 91102003 is about 9544.7369267047. The cubic root of 91102003 is about 449.9621416710.

The spelling of 91102003 in words is "ninety-one million, one hundred two thousand, three".