91000000001003 has 8 divisors (see below), whose sum is σ = 91850750494272. Its totient is φ = 90149254752456.

The previous prime is 91000000000999. The next prime is 91000000001011. The reversal of 91000000001003 is 30010000000019.

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 91000000001003 - 2² = 91000000000999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91000000001803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39447176 + ... + 41690282.

It is an arithmetic number, because the mean of its divisors is an integer number (11481343811784).

Almost surely, 2^{91000000001003} is an apocalyptic number.

91000000001003 is a deficient number, since it is larger than the sum of its proper divisors (850750493269).

91000000001003 is a wasteful number, since it uses less digits than its factorization.

91000000001003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622361.

The product of its (nonzero) digits is 27, while the sum is 14.

The spelling of 91000000001003 in words is "ninety-one trillion, one thousand, three".