6220421749 has 2 divisors, whose sum is σ = 6220421750. Its totient is φ = 6220421748.

The previous prime is 6220421741. The next prime is 6220421789. The reversal of 6220421749 is 9471240226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6137939025 + 82482724 = 78345^2 + 9082^2 .

It is a cyclic number.

It is not a de Polignac number, because 6220421749 - 2³ = 6220421741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6220421741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110210874 + 3110210875.

It is an arithmetic number, because the mean of its divisors is an integer number (3110210875).

Almost surely, 2^6220421749 is an apocalyptic number.

It is an amenable number.

6220421749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6220421749 is an equidigital number, since it uses as much as digits as its factorization.

6220421749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 6220421749 is about 78869.6503669187. The cubic root of 6220421749 is about 1839.1053611005.

The spelling of 6220421749 in words is "six billion, two hundred twenty million, four hundred twenty-one thousand, seven hundred forty-nine".