1968202111 has 4 divisors (see below), whose sum is σ = 1968329952. Its totient is φ = 1968074272.

The previous prime is 1968202109. The next prime is 1968202123. The reversal of 1968202111 is 1112028691.

It is a happy number.

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 1968202111 - 2¹ = 1968202109 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 (1968202141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37066 + ... + 72871.

It is an arithmetic number, because the mean of its divisors is an integer number (492082488).

Almost surely, 2^1968202111 is an apocalyptic number.

1968202111 is a deficient number, since it is larger than the sum of its proper divisors (127841).

1968202111 is a wasteful number, since it uses less digits than its factorization.

1968202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127840.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 1968202111 is about 44364.4239340488. The cubic root of 1968202111 is about 1253.2082092171.

The spelling of 1968202111 in words is "one billion, nine hundred sixty-eight million, two hundred two thousand, one hundred eleven".