6419294821 has 2 divisors, whose sum is σ = 6419294822. Its totient is φ = 6419294820.

The previous prime is 6419294789. The next prime is 6419294831. The reversal of 6419294821 is 1284929146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5477480100 + 941814721 = 74010^2 + 30689^2 .

It is a cyclic number.

It is not a de Polignac number, because 6419294821 - 2⁵ = 6419294789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6419294831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209647410 + 3209647411.

It is an arithmetic number, because the mean of its divisors is an integer number (3209647411).

Almost surely, 2^6419294821 is an apocalyptic number.

It is an amenable number.

6419294821 is a deficient number, since it is larger than the sum of its proper divisors (1).

6419294821 is an equidigital number, since it uses as much as digits as its factorization.

6419294821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 6419294821 is about 80120.5018768605. The cubic root of 6419294821 is about 1858.4994662622.

The spelling of 6419294821 in words is "six billion, four hundred nineteen million, two hundred ninety-four thousand, eight hundred twenty-one".