199997469 has 96 divisors (see below), whose sum is σ = 369907200. Its totient is φ = 103638528.

The previous prime is 199997459. The next prime is 199997491. The reversal of 199997469 is 964799991.

199997469 = T₄₆₂ + T₄₆₃ + ... + T₁₀₉₀.

It is not a de Polignac number, because 199997469 - 2⁷ = 199997341 is a prime.

It is a super-2 number, since 2×199997469² = 79997975212811922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199997419) 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 95 ways as a sum of consecutive naturals, for example, 1941672 + ... + 1941774.

It is an arithmetic number, because the mean of its divisors is an integer number (3853200).

Almost surely, 2^199997469 is an apocalyptic number.

It is an amenable number.

199997469 is a deficient number, since it is larger than the sum of its proper divisors (169909731).

199997469 is a wasteful number, since it uses less digits than its factorization.

199997469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 167 counting only the distinct ones).

The product of its digits is 9920232, while the sum is 63.

The square root of 199997469 is about 14142.0461390847. The cubic root of 199997469 is about 584.8010807359.

The spelling of 199997469 in words is "one hundred ninety-nine million, nine hundred ninety-seven thousand, four hundred sixty-nine".