3640244197 has 2 divisors, whose sum is σ = 3640244198. Its totient is φ = 3640244196.

The previous prime is 3640244183. The next prime is 3640244273. The reversal of 3640244197 is 7914420463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3632593441 + 7650756 = 60271^2 + 2766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640244197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3640244107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820122098 + 1820122099.

It is an arithmetic number, because the mean of its divisors is an integer number (1820122099).

Almost surely, 2^3640244197 is an apocalyptic number.

It is an amenable number.

3640244197 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640244197 is an equidigital number, since it uses as much as digits as its factorization.

3640244197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 3640244197 is about 60334.4362449837. The cubic root of 3640244197 is about 1538.3087348756.

The spelling of 3640244197 in words is "three billion, six hundred forty million, two hundred forty-four thousand, one hundred ninety-seven".