2203649197 has 4 divisors (see below), whose sum is σ = 2203745020. Its totient is φ = 2203553376.

The previous prime is 2203649183. The next prime is 2203649207. The reversal of 2203649197 is 7919463022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 973814436 + 1229834761 = 31206^2 + 35069^2 .

It is a 3-Lehmer number, since φ(2203649197) divides (2203649197-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2203649197 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 (2203649597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9583 + ... + 67075.

It is an arithmetic number, because the mean of its divisors is an integer number (550936255).

It is a Poulet number, since it divides 2^2203649196-1.

Almost surely, 2^2203649197 is an apocalyptic number.

2203649197 is the 38329-th pentagonal number.

It is an amenable number.

2203649197 is a deficient number, since it is larger than the sum of its proper divisors (95823).

2203649197 is an equidigital number, since it uses as much as digits as its factorization.

2203649197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95822.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 2203649197 is about 46943.0420509792. The cubic root of 2203649197 is about 1301.3101578596.

The spelling of 2203649197 in words is "two billion, two hundred three million, six hundred forty-nine thousand, one hundred ninety-seven".