426997 has 2 divisors, whose sum is σ = 426998. Its totient is φ = 426996.

The previous prime is 426973. The next prime is 427001. The reversal of 426997 is 799624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298116 + 128881 = 546^2 + 359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213498 + 213499.

It is an arithmetic number, because the mean of its divisors is an integer number (213499).

2⁴²⁶⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

426997 is a deficient number, since it is larger than the sum of its proper divisors (1).

426997 is an equidigital number, since it uses as much as digits as its factorization.

426997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 426997 is about 653.4500746040. The cubic root of 426997 is about 75.3023057717.

The spelling of 426997 in words is "four hundred twenty-six thousand, nine hundred ninety-seven".