426191893 has 2 divisors, whose sum is σ = 426191894. Its totient is φ = 426191892.

The previous prime is 426191881. The next prime is 426191929. The reversal of 426191893 is 398191624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384434449 + 41757444 = 19607^2 + 6462^2 .

It is a cyclic number.

It is not a de Polignac number, because 426191893 - 2¹³ = 426183701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426191833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213095946 + 213095947.

It is an arithmetic number, because the mean of its divisors is an integer number (213095947).

Almost surely, 2^426191893 is an apocalyptic number.

It is an amenable number.

426191893 is a deficient number, since it is larger than the sum of its proper divisors (1).

426191893 is an equidigital number, since it uses as much as digits as its factorization.

426191893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 426191893 is about 20644.4155402859. The cubic root of 426191893 is about 752.5494825133.

The spelling of 426191893 in words is "four hundred twenty-six million, one hundred ninety-one thousand, eight hundred ninety-three".