2905671421 has 2 divisors, whose sum is σ = 2905671422. Its totient is φ = 2905671420.

The previous prime is 2905671413. The next prime is 2905671437. The reversal of 2905671421 is 1241765092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2251028025 + 654643396 = 47445^2 + 25586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2905671421 - 2³ = 2905671413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2905671401) 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, 1452835710 + 1452835711.

It is an arithmetic number, because the mean of its divisors is an integer number (1452835711).

Almost surely, 2^2905671421 is an apocalyptic number.

It is an amenable number.

2905671421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2905671421 is an equidigital number, since it uses as much as digits as its factorization.

2905671421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 2905671421 is about 53904.2801732849. The cubic root of 2905671421 is about 1426.9721614537.

It can be divided in two parts, 2905671 and 421, that added together give a palindrome (2906092).

The spelling of 2905671421 in words is "two billion, nine hundred five million, six hundred seventy-one thousand, four hundred twenty-one".