3240405197 has 4 divisors (see below), whose sum is σ = 3241499580. Its totient is φ = 3239310816.

The previous prime is 3240405191. The next prime is 3240405221. The reversal of 3240405197 is 7915040423.

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 415588996 + 2824816201 = 20386^2 + 53149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3240405197 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 (3240405191) 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, 542738 + ... + 548675.

It is an arithmetic number, because the mean of its divisors is an integer number (810374895).

Almost surely, 2^3240405197 is an apocalyptic number.

It is an amenable number.

3240405197 is a deficient number, since it is larger than the sum of its proper divisors (1094383).

3240405197 is a wasteful number, since it uses less digits than its factorization.

3240405197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094382.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 3240405197 is about 56924.5570645921. The cubic root of 3240405197 is about 1479.7889273192.

The spelling of 3240405197 in words is "three billion, two hundred forty million, four hundred five thousand, one hundred ninety-seven".