3781650197 has 4 divisors (see below), whose sum is σ = 4072546380. Its totient is φ = 3490754016.

The previous prime is 3781650167. The next prime is 3781650239. The reversal of 3781650197 is 7910561873.

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 1602721156 + 2178929041 = 40034^2 + 46679^2 .

It is a cyclic number.

It is not a de Polignac number, because 3781650197 - 2²² = 3777455893 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 (3781650137) 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, 145448072 + ... + 145448097.

It is an arithmetic number, because the mean of its divisors is an integer number (1018136595).

Almost surely, 2^3781650197 is an apocalyptic number.

It is an amenable number.

3781650197 is a deficient number, since it is larger than the sum of its proper divisors (290896183).

3781650197 is a wasteful number, since it uses less digits than its factorization.

3781650197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290896182.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 3781650197 is about 61495.1233594990. The cubic root of 3781650197 is about 1557.9748811263.

The spelling of 3781650197 in words is "three billion, seven hundred eighty-one million, six hundred fifty thousand, one hundred ninety-seven".