910000090091 has 4 divisors (see below), whose sum is σ = 910053696384. Its totient is φ = 909946483800.

The previous prime is 910000090049. The next prime is 910000090123. The reversal of 910000090091 is 190090000019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-910000090091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (910000090031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26777675 + ... + 26811636.

It is an arithmetic number, because the mean of its divisors is an integer number (227513424096).

Almost surely, 2^910000090091 is an apocalyptic number.

910000090091 is a deficient number, since it is larger than the sum of its proper divisors (53606293).

910000090091 is a wasteful number, since it uses less digits than its factorization.

910000090091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53606292.

The product of its (nonzero) digits is 729, while the sum is 29.

The spelling of 910000090091 in words is "nine hundred ten billion, ninety thousand, ninety-one".