420838331 has 2 divisors, whose sum is σ = 420838332. Its totient is φ = 420838330.

The previous prime is 420838307. The next prime is 420838367. The reversal of 420838331 is 133838024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420838331 is a prime.

It is a super-2 number, since 2×420838331² = 354209801677731122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420838031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210419165 + 210419166.

It is an arithmetic number, because the mean of its divisors is an integer number (210419166).

Almost surely, 2^420838331 is an apocalyptic number.

420838331 is a deficient number, since it is larger than the sum of its proper divisors (1).

420838331 is an equidigital number, since it uses as much as digits as its factorization.

420838331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 420838331 is about 20514.3445179221. The cubic root of 420838331 is about 749.3851737523.

The spelling of 420838331 in words is "four hundred twenty million, eight hundred thirty-eight thousand, three hundred thirty-one".