426619693 has 2 divisors, whose sum is σ = 426619694. Its totient is φ = 426619692.

The previous prime is 426619679. The next prime is 426619733. The reversal of 426619693 is 396916624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 368524809 + 58094884 = 19197^2 + 7622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426619693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426619603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213309846 + 213309847.

It is an arithmetic number, because the mean of its divisors is an integer number (213309847).

Almost surely, 2^426619693 is an apocalyptic number.

It is an amenable number.

426619693 is a deficient number, since it is larger than the sum of its proper divisors (1).

426619693 is an equidigital number, since it uses as much as digits as its factorization.

426619693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 426619693 is about 20654.7740970459. The cubic root of 426619693 is about 752.8011946454.

The spelling of 426619693 in words is "four hundred twenty-six million, six hundred nineteen thousand, six hundred ninety-three".