3905908213 has 2 divisors, whose sum is σ = 3905908214. Its totient is φ = 3905908212.

The previous prime is 3905908211. The next prime is 3905908229. The reversal of 3905908213 is 3128095093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3198241809 + 707666404 = 56553^2 + 26602^2 .

It is a cyclic number.

It is not a de Polignac number, because 3905908213 - 2¹ = 3905908211 is a prime.

It is a super-2 number, since 2×3905908213² = 30512237936761706738, which contains 22 as substring.

Together with 3905908211, 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 (3905908211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1952954106 + 1952954107.

It is an arithmetic number, because the mean of its divisors is an integer number (1952954107).

Almost surely, 2^3905908213 is an apocalyptic number.

It is an amenable number.

3905908213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3905908213 is an equidigital number, since it uses as much as digits as its factorization.

3905908213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 3905908213 is about 62497.2656441864. The cubic root of 3905908213 is about 1574.8553777344.

The spelling of 3905908213 in words is "three billion, nine hundred five million, nine hundred eight thousand, two hundred thirteen".