420533291 has 2 divisors, whose sum is σ = 420533292. Its totient is φ = 420533290.

The previous prime is 420533273. The next prime is 420533387. The reversal of 420533291 is 192335024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420533291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420533261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210266645 + 210266646.

It is an arithmetic number, because the mean of its divisors is an integer number (210266646).

Almost surely, 2^420533291 is an apocalyptic number.

420533291 is a deficient number, since it is larger than the sum of its proper divisors (1).

420533291 is an equidigital number, since it uses as much as digits as its factorization.

420533291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 420533291 is about 20506.9083725461. The cubic root of 420533291 is about 749.2040688087.

The spelling of 420533291 in words is "four hundred twenty million, five hundred thirty-three thousand, two hundred ninety-one".