426795821 has 2 divisors, whose sum is σ = 426795822. Its totient is φ = 426795820.

The previous prime is 426795791. The next prime is 426795823. The reversal of 426795821 is 128597624.

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., 426422500 + 373321 = 20650^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 426795821 - 2⁶ = 426795757 is a prime.

Together with 426795823, 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 (426795823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213397910 + 213397911.

It is an arithmetic number, because the mean of its divisors is an integer number (213397911).

Almost surely, 2^426795821 is an apocalyptic number.

It is an amenable number.

426795821 is a deficient number, since it is larger than the sum of its proper divisors (1).

426795821 is an equidigital number, since it uses as much as digits as its factorization.

426795821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 426795821 is about 20659.0372718576. The cubic root of 426795821 is about 752.9047772420.

The spelling of 426795821 in words is "four hundred twenty-six million, seven hundred ninety-five thousand, eight hundred twenty-one".