1992190111 has 4 divisors (see below), whose sum is σ = 1992401224. Its totient is φ = 1991979000.

The previous prime is 1992190099. The next prime is 1992190121. The reversal of 1992190111 is 1110912991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1992190111 - 2²¹ = 1990092959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992190121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90705 + ... + 110506.

It is an arithmetic number, because the mean of its divisors is an integer number (498100306).

Almost surely, 2^1992190111 is an apocalyptic number.

1992190111 is a deficient number, since it is larger than the sum of its proper divisors (211113).

1992190111 is an equidigital number, since it uses as much as digits as its factorization.

1992190111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211112.

The product of its (nonzero) digits is 1458, while the sum is 34.

The square root of 1992190111 is about 44633.9569274336. The cubic root of 1992190111 is about 1258.2789366580.

The spelling of 1992190111 in words is "one billion, nine hundred ninety-two million, one hundred ninety thousand, one hundred eleven".