1920199 has 2 divisors, whose sum is σ = 1920200. Its totient is φ = 1920198.

The previous prime is 1920187. The next prime is 1920203. The reversal of 1920199 is 9910291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1920199 - 2¹¹ = 1918151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1920199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960099 + 960100.

It is an arithmetic number, because the mean of its divisors is an integer number (960100).

2^1920199 is an apocalyptic number.

1920199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920199 is an equidigital number, since it uses as much as digits as its factorization.

1920199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 1920199 is about 1385.7124521343. The cubic root of 1920199 is about 124.2935941125.

The spelling of 1920199 in words is "one million, nine hundred twenty thousand, one hundred ninety-nine".