420541949 has 2 divisors, whose sum is σ = 420541950. Its totient is φ = 420541948.

The previous prime is 420541883. The next prime is 420541951. The reversal of 420541949 is 949145024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420537049 + 4900 = 20507^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 420541949 - 2¹² = 420537853 is a prime.

Together with 420541951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420541969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210270974 + 210270975.

It is an arithmetic number, because the mean of its divisors is an integer number (210270975).

Almost surely, 2^420541949 is an apocalyptic number.

It is an amenable number.

420541949 is a deficient number, since it is larger than the sum of its proper divisors (1).

420541949 is an equidigital number, since it uses as much as digits as its factorization.

420541949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 420541949 is about 20507.1194710520. The cubic root of 420541949 is about 749.2092103472.

The spelling of 420541949 in words is "four hundred twenty million, five hundred forty-one thousand, nine hundred forty-nine".