1013191811 has 2 divisors, whose sum is σ = 1013191812. Its totient is φ = 1013191810.

The previous prime is 1013191801. The next prime is 1013191813. The reversal of 1013191811 is 1181913101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013191811 is a prime.

Together with 1013191813, 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 (1013191813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506595905 + 506595906.

It is an arithmetic number, because the mean of its divisors is an integer number (506595906).

Almost surely, 2^1013191811 is an apocalyptic number.

1013191811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013191811 is an equidigital number, since it uses as much as digits as its factorization.

1013191811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 26.

The square root of 1013191811 is about 31830.6740582100. The cubic root of 1013191811 is about 1004.3780748219.

The spelling of 1013191811 in words is "one billion, thirteen million, one hundred ninety-one thousand, eight hundred eleven".