199169669 has 2 divisors, whose sum is σ = 199169670. Its totient is φ = 199169668.

The previous prime is 199169617. The next prime is 199169683. The reversal of 199169669 is 966961991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159012100 + 40157569 = 12610^2 + 6337^2 .

It is an emirp because it is prime and its reverse (966961991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199169669 is a prime.

It is a super-2 number, since 2×199169669² = 79337114099139122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199169689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99584834 + 99584835.

It is an arithmetic number, because the mean of its divisors is an integer number (99584835).

Almost surely, 2^199169669 is an apocalyptic number.

It is an amenable number.

199169669 is a deficient number, since it is larger than the sum of its proper divisors (1).

199169669 is an equidigital number, since it uses as much as digits as its factorization.

199169669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 56.

The square root of 199169669 is about 14112.7484566260. The cubic root of 199169669 is about 583.9931242154.

The spelling of 199169669 in words is "one hundred ninety-nine million, one hundred sixty-nine thousand, six hundred sixty-nine".