1920911 has 2 divisors, whose sum is σ = 1920912. Its totient is φ = 1920910.

The previous prime is 1920901. The next prime is 1920913. The reversal of 1920911 is 1190291.

It is a strong prime.

It is an emirp because it is prime and its reverse (1190291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1920911 is a prime.

Together with 1920913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960455 + 960456.

It is an arithmetic number, because the mean of its divisors is an integer number (960456).

2^1920911 is an apocalyptic number.

1920911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920911 is an equidigital number, since it uses as much as digits as its factorization.

1920911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1920911 is about 1385.9693358801. The cubic root of 1920911 is about 124.3089546911.

The spelling of 1920911 in words is "one million, nine hundred twenty thousand, nine hundred eleven".