3216137389 has 2 divisors, whose sum is σ = 3216137390. Its totient is φ = 3216137388.

The previous prime is 3216137387. The next prime is 3216137411. The reversal of 3216137389 is 9837316123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2952074889 + 264062500 = 54333^2 + 16250^2 .

It is a cyclic number.

It is not a de Polignac number, because 3216137389 - 2¹ = 3216137387 is a prime.

Together with 3216137387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3216137383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608068694 + 1608068695.

It is an arithmetic number, because the mean of its divisors is an integer number (1608068695).

Almost surely, 2^3216137389 is an apocalyptic number.

It is an amenable number.

3216137389 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216137389 is an equidigital number, since it uses as much as digits as its factorization.

3216137389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 3216137389 is about 56710.9988362046. The cubic root of 3216137389 is about 1476.0855575058.

The spelling of 3216137389 in words is "three billion, two hundred sixteen million, one hundred thirty-seven thousand, three hundred eighty-nine".