3213920971 has 4 divisors (see below), whose sum is σ = 3214319112. Its totient is φ = 3213522832.

The previous prime is 3213920933. The next prime is 3213920981. The reversal of 3213920971 is 1790293123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3213920971 - 2⁹ = 3213920459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3213920971.

It is not an unprimeable number, because it can be changed into a prime (3213920981) 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 in 3 ways as a sum of consecutive naturals, for example, 186706 + ... + 203191.

It is an arithmetic number, because the mean of its divisors is an integer number (803579778).

Almost surely, 2^3213920971 is an apocalyptic number.

3213920971 is a deficient number, since it is larger than the sum of its proper divisors (398141).

3213920971 is an equidigital number, since it uses as much as digits as its factorization.

3213920971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398140.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 3213920971 is about 56691.4541267024. The cubic root of 3213920971 is about 1475.7463955398.

The spelling of 3213920971 in words is "three billion, two hundred thirteen million, nine hundred twenty thousand, nine hundred seventy-one".