3240639461 has 2 divisors, whose sum is σ = 3240639462. Its totient is φ = 3240639460.

The previous prime is 3240639371. The next prime is 3240639499. The reversal of 3240639461 is 1649360423.

It is a happy number.

It is an a-pointer prime, because the next prime (3240639499) can be obtained adding 3240639461 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2572416961 + 668222500 = 50719^2 + 25850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3240639461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3240639361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1620319730 + 1620319731.

It is an arithmetic number, because the mean of its divisors is an integer number (1620319731).

Almost surely, 2^3240639461 is an apocalyptic number.

It is an amenable number.

3240639461 is a deficient number, since it is larger than the sum of its proper divisors (1).

3240639461 is an equidigital number, since it uses as much as digits as its factorization.

3240639461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 3240639461 is about 56926.6146982235. The cubic root of 3240639461 is about 1479.8245867402.

Adding to 3240639461 its reverse (1649360423), we get a palindrome (4889999884).

The spelling of 3240639461 in words is "three billion, two hundred forty million, six hundred thirty-nine thousand, four hundred sixty-one".