191092911001 has 2 divisors, whose sum is σ = 191092911002. Its totient is φ = 191092911000.

The previous prime is 191092910993. The next prime is 191092911011. The reversal of 191092911001 is 100119290191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189594059776 + 1498851225 = 435424^2 + 38715^2 .

It is a cyclic number.

It is not a de Polignac number, because 191092911001 - 2³ = 191092910993 is a prime.

It is a super-2 number, since 2×191092911001² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191092911011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95546455500 + 95546455501.

It is an arithmetic number, because the mean of its divisors is an integer number (95546455501).

Almost surely, 2^191092911001 is an apocalyptic number.

It is an amenable number.

191092911001 is a deficient number, since it is larger than the sum of its proper divisors (1).

191092911001 is an equidigital number, since it uses as much as digits as its factorization.

191092911001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 191092911001 in words is "one hundred ninety-one billion, ninety-two million, nine hundred eleven thousand, one".