1941688169 has 4 divisors (see below), whose sum is σ = 1963504980. Its totient is φ = 1919871360.

The previous prime is 1941688087. The next prime is 1941688211. The reversal of 1941688169 is 9618861491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 706868569 + 1234819600 = 26587^2 + 35140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1941688169 is a prime.

It is a super-2 number, since 2×1941688169² = 7540305891269145122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1941688169.

It is not an unprimeable number, because it can be changed into a prime (1941688369) 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, 10908272 + ... + 10908449.

It is an arithmetic number, because the mean of its divisors is an integer number (490876245).

Almost surely, 2^1941688169 is an apocalyptic number.

It is an amenable number.

1941688169 is a deficient number, since it is larger than the sum of its proper divisors (21816811).

1941688169 is an equidigital number, since it uses as much as digits as its factorization.

1941688169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21816810.

The product of its digits is 746496, while the sum is 53.

The square root of 1941688169 is about 44064.5908752141. The cubic root of 1941688169 is about 1247.5553648439. Note that the first 3 decimals are identical.

The spelling of 1941688169 in words is "one billion, nine hundred forty-one million, six hundred eighty-eight thousand, one hundred sixty-nine".