91119011 has 2 divisors, whose sum is σ = 91119012. Its totient is φ = 91119010.

The previous prime is 91118999. The next prime is 91119029. The reversal of 91119011 is 11091119.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91119011 - 2¹⁰ = 91117987 is a prime.

It is not a weakly prime, because it can be changed into another prime (91119211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45559505 + 45559506.

It is an arithmetic number, because the mean of its divisors is an integer number (45559506).

Almost surely, 2^91119011 is an apocalyptic number.

91119011 is a deficient number, since it is larger than the sum of its proper divisors (1).

91119011 is an equidigital number, since it uses as much as digits as its factorization.

91119011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 23.

The square root of 91119011 is about 9545.6278473446. The cubic root of 91119011 is about 449.9901413478.

The spelling of 91119011 in words is "ninety-one million, one hundred nineteen thousand, eleven".