199695145 has 8 divisors (see below), whose sum is σ = 258067656. Its totient is φ = 147467136.

The previous prime is 199695143. The next prime is 199695169. The reversal of 199695145 is 541596991.

It can be written as a sum of positive squares in 4 ways, for example, as 3779136 + 195916009 = 1944^2 + 13997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199695145 - 2¹ = 199695143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199695143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536052 + ... + 1536181.

It is an arithmetic number, because the mean of its divisors is an integer number (32258457).

Almost surely, 2^199695145 is an apocalyptic number.

It is an amenable number.

199695145 is a deficient number, since it is larger than the sum of its proper divisors (58372511).

199695145 is a wasteful number, since it uses less digits than its factorization.

199695145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072251.

The product of its digits is 437400, while the sum is 49.

The square root of 199695145 is about 14131.3532614538. The cubic root of 199695145 is about 584.5062627342.

The spelling of 199695145 in words is "one hundred ninety-nine million, six hundred ninety-five thousand, one hundred forty-five".