426165997 has 2 divisors, whose sum is σ = 426165998. Its totient is φ = 426165996.

The previous prime is 426165937. The next prime is 426166003. The reversal of 426165997 is 799561624.

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., 239816196 + 186349801 = 15486^2 + 13651^2 .

It is a cyclic number.

It is not a de Polignac number, because 426165997 - 2¹⁹ = 425641709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 426165997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426165917) 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, 213082998 + 213082999.

It is an arithmetic number, because the mean of its divisors is an integer number (213082999).

Almost surely, 2^426165997 is an apocalyptic number.

It is an amenable number.

426165997 is a deficient number, since it is larger than the sum of its proper divisors (1).

426165997 is an equidigital number, since it uses as much as digits as its factorization.

426165997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The square root of 426165997 is about 20643.7883393528. The cubic root of 426165997 is about 752.5342402274.

The spelling of 426165997 in words is "four hundred twenty-six million, one hundred sixty-five thousand, nine hundred ninety-seven".