91192093019 has 2 divisors, whose sum is σ = 91192093020. Its totient is φ = 91192093018.

The previous prime is 91192093009. The next prime is 91192093021. The reversal of 91192093019 is 91039029119.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91192093019 is a prime.

It is a super-2 number, since 2×91192093019² (a number of 23 digits) contains 22 as substring.

Together with 91192093021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91192093009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45596046509 + 45596046510.

It is an arithmetic number, because the mean of its divisors is an integer number (45596046510).

Almost surely, 2^91192093019 is an apocalyptic number.

91192093019 is a deficient number, since it is larger than the sum of its proper divisors (1).

91192093019 is an equidigital number, since it uses as much as digits as its factorization.

91192093019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 44.

The spelling of 91192093019 in words is "ninety-one billion, one hundred ninety-two million, ninety-three thousand, nineteen".