1919811011 has 2 divisors, whose sum is σ = 1919811012. Its totient is φ = 1919811010.

The previous prime is 1919811001. The next prime is 1919811029. The reversal of 1919811011 is 1101189191.

It is a weak prime.

It is an emirp because it is prime and its reverse (1101189191) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1101186161 and 1616811011.

It is a cyclic number.

It is not a de Polignac number, because 1919811011 - 2⁶ = 1919810947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1919811001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959905505 + 959905506.

It is an arithmetic number, because the mean of its divisors is an integer number (959905506).

Almost surely, 2^1919811011 is an apocalyptic number.

1919811011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919811011 is an equidigital number, since it uses as much as digits as its factorization.

1919811011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 32.

The square root of 1919811011 is about 43815.6480152924. The cubic root of 1919811011 is about 1242.8522209904.

The spelling of 1919811011 in words is "one billion, nine hundred nineteen million, eight hundred eleven thousand, eleven".