3420851381 has 2 divisors, whose sum is σ = 3420851382. Its totient is φ = 3420851380.

The previous prime is 3420851323. The next prime is 3420851383. The reversal of 3420851381 is 1831580243.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3128612356 + 292239025 = 55934^2 + 17095^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420851381 - 2¹⁴ = 3420834997 is a prime.

It is a super-2 number, since 2×3420851381² = 23404448341779214322, which contains 22 as substring.

Together with 3420851383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3420851383) 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, 1710425690 + 1710425691.

It is an arithmetic number, because the mean of its divisors is an integer number (1710425691).

Almost surely, 2^3420851381 is an apocalyptic number.

It is an amenable number.

3420851381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420851381 is an equidigital number, since it uses as much as digits as its factorization.

3420851381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 3420851381 is about 58488.0447698502. The cubic root of 3420851381 is about 1506.7622658806.

The spelling of 3420851381 in words is "three billion, four hundred twenty million, eight hundred fifty-one thousand, three hundred eighty-one".