3201971939 has 2 divisors, whose sum is σ = 3201971940. Its totient is φ = 3201971938.

The previous prime is 3201971911. The next prime is 3201971999. The reversal of 3201971939 is 9391791023.

It is a weak prime.

It is an emirp because it is prime and its reverse (9391791023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3201971939 - 2¹² = 3201967843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3201971939.

It is not a weakly prime, because it can be changed into another prime (3201971999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600985969 + 1600985970.

It is an arithmetic number, because the mean of its divisors is an integer number (1600985970).

Almost surely, 2^3201971939 is an apocalyptic number.

3201971939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3201971939 is an equidigital number, since it uses as much as digits as its factorization.

3201971939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 3201971939 is about 56585.9694535668. The cubic root of 3201971939 is about 1473.9152325253.

The spelling of 3201971939 in words is "three billion, two hundred one million, nine hundred seventy-one thousand, nine hundred thirty-nine".