3231439661 has 2 divisors, whose sum is σ = 3231439662. Its totient is φ = 3231439660.

The previous prime is 3231439639. The next prime is 3231439691. The reversal of 3231439661 is 1669341323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2447775625 + 783664036 = 49475^2 + 27994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3231439661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3231439691) 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 as a sum of consecutive naturals, namely, 1615719830 + 1615719831.

It is an arithmetic number, because the mean of its divisors is an integer number (1615719831).

Almost surely, 2^3231439661 is an apocalyptic number.

It is an amenable number.

3231439661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3231439661 is an equidigital number, since it uses as much as digits as its factorization.

3231439661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 38.

The square root of 3231439661 is about 56845.7532362797. The cubic root of 3231439661 is about 1478.4229093146.

The spelling of 3231439661 in words is "three billion, two hundred thirty-one million, four hundred thirty-nine thousand, six hundred sixty-one".