1900911011 has 2 divisors, whose sum is σ = 1900911012. Its totient is φ = 1900911010.

The previous prime is 1900911007. The next prime is 1900911013. The reversal of 1900911011 is 1101190091.

It is a happy number.

It is a strong prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1101160061 and 1600611011.

It is a cyclic number.

It is not a de Polignac number, because 1900911011 - 2² = 1900911007 is a prime.

It is a super-2 number, since 2×1900911011² = 7226925343482084242, which contains 22 as substring.

Together with 1900911013, 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 (1900911013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950455505 + 950455506.

It is an arithmetic number, because the mean of its divisors is an integer number (950455506).

Almost surely, 2^1900911011 is an apocalyptic number.

1900911011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900911011 is an equidigital number, since it uses as much as digits as its factorization.

1900911011 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 1900911011 is about 43599.4381959217. The cubic root of 1900911011 is about 1238.7602530714.

The spelling of 1900911011 in words is "one billion, nine hundred million, nine hundred eleven thousand, eleven".