1992191311 has 12 divisors (see below), whose sum is σ = 2201254272. Its totient is φ = 1801580000.

The previous prime is 1992191309. The next prime is 1992191321. The reversal of 1992191311 is 1131912991.

It is not a de Polignac number, because 1992191311 - 2¹ = 1992191309 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 (1992191321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19990 + ... + 66211.

It is an arithmetic number, because the mean of its divisors is an integer number (183437856).

Almost surely, 2^1992191311 is an apocalyptic number.

1992191311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1992191311 is a deficient number, since it is larger than the sum of its proper divisors (209062961).

1992191311 is a wasteful number, since it uses less digits than its factorization.

1992191311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86414 (or 86403 counting only the distinct ones).

The product of its digits is 4374, while the sum is 37.

The square root of 1992191311 is about 44633.9703701116. The cubic root of 1992191311 is about 1258.2791893003.

The spelling of 1992191311 in words is "one billion, nine hundred ninety-two million, one hundred ninety-one thousand, three hundred eleven".