420794641 has 2 divisors, whose sum is σ = 420794642. Its totient is φ = 420794640.

The previous prime is 420794623. The next prime is 420794657. The reversal of 420794641 is 146497024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388247616 + 32547025 = 19704^2 + 5705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420794641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420794641.

It is not a weakly prime, because it can be changed into another prime (420794741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210397320 + 210397321.

It is an arithmetic number, because the mean of its divisors is an integer number (210397321).

Almost surely, 2^420794641 is an apocalyptic number.

It is an amenable number.

420794641 is a deficient number, since it is larger than the sum of its proper divisors (1).

420794641 is an equidigital number, since it uses as much as digits as its factorization.

420794641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 420794641 is about 20513.2796256474. The cubic root of 420794641 is about 749.3592399840.

The spelling of 420794641 in words is "four hundred twenty million, seven hundred ninety-four thousand, six hundred forty-one".