2943927421 has 2 divisors, whose sum is σ = 2943927422. Its totient is φ = 2943927420.

The previous prime is 2943927419. The next prime is 2943927433. The reversal of 2943927421 is 1247293492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1568556025 + 1375371396 = 39605^2 + 37086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2943927421 - 2¹ = 2943927419 is a prime.

It is a super-2 number, since 2×2943927421² = 17333417320231422482, which contains 22 as substring.

Together with 2943927419, 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 (2943927521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1471963710 + 1471963711.

It is an arithmetic number, because the mean of its divisors is an integer number (1471963711).

Almost surely, 2^2943927421 is an apocalyptic number.

It is an amenable number.

2943927421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2943927421 is an equidigital number, since it uses as much as digits as its factorization.

2943927421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 2943927421 is about 54257.9710365214. The cubic root of 2943927421 is about 1433.2073705002.

The spelling of 2943927421 in words is "two billion, nine hundred forty-three million, nine hundred twenty-seven thousand, four hundred twenty-one".