420841019 has 2 divisors, whose sum is σ = 420841020. Its totient is φ = 420841018.

The previous prime is 420840989. The next prime is 420841063. The reversal of 420841019 is 910148024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420841019 is a prime.

It is a super-2 number, since 2×420841019² = 354214326545916722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420840982 and 420841000.

It is not a weakly prime, because it can be changed into another prime (420841319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210420509 + 210420510.

It is an arithmetic number, because the mean of its divisors is an integer number (210420510).

Almost surely, 2^420841019 is an apocalyptic number.

420841019 is a deficient number, since it is larger than the sum of its proper divisors (1).

420841019 is an equidigital number, since it uses as much as digits as its factorization.

420841019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 420841019 is about 20514.4100329500. The cubic root of 420841019 is about 749.3867692526.

The spelling of 420841019 in words is "four hundred twenty million, eight hundred forty-one thousand, nineteen".