426198389 has 2 divisors, whose sum is σ = 426198390. Its totient is φ = 426198388.

The previous prime is 426198361. The next prime is 426198391. The reversal of 426198389 is 983891624.

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., 362597764 + 63600625 = 19042^2 + 7975^2 .

It is a cyclic number.

It is not a de Polignac number, because 426198389 - 2⁸ = 426198133 is a prime.

Together with 426198391, 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 (426198089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213099194 + 213099195.

It is an arithmetic number, because the mean of its divisors is an integer number (213099195).

Almost surely, 2^426198389 is an apocalyptic number.

It is an amenable number.

426198389 is a deficient number, since it is larger than the sum of its proper divisors (1).

426198389 is an equidigital number, since it uses as much as digits as its factorization.

426198389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 426198389 is about 20644.5728703696. The cubic root of 426198389 is about 752.5533059371.

The spelling of 426198389 in words is "four hundred twenty-six million, one hundred ninety-eight thousand, three hundred eighty-nine".