419420921 has 2 divisors, whose sum is σ = 419420922. Its totient is φ = 419420920.

The previous prime is 419420899. The next prime is 419420941. The reversal of 419420921 is 129024914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410629696 + 8791225 = 20264^2 + 2965^2 .

It is a cyclic number.

It is not a de Polignac number, because 419420921 - 2¹⁸ = 419158777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (419420941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209710460 + 209710461.

It is an arithmetic number, because the mean of its divisors is an integer number (209710461).

Almost surely, 2^419420921 is an apocalyptic number.

It is an amenable number.

419420921 is a deficient number, since it is larger than the sum of its proper divisors (1).

419420921 is an equidigital number, since it uses as much as digits as its factorization.

419420921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 419420921 is about 20479.7685777940. The cubic root of 419420921 is about 748.5429019499.

The spelling of 419420921 in words is "four hundred nineteen million, four hundred twenty thousand, nine hundred twenty-one".