426637 has 2 divisors, whose sum is σ = 426638. Its totient is φ = 426636.

The previous prime is 426631. The next prime is 426641. The reversal of 426637 is 736624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292681 + 133956 = 541^2 + 366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426637 is a prime.

It is equal to p₃₅₈₉₃ and since 426637 and 35893 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426631) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213318 + 213319.

It is an arithmetic number, because the mean of its divisors is an integer number (213319).

2⁴²⁶⁶³⁷ is an apocalyptic number.

It is an amenable number.

426637 is a deficient number, since it is larger than the sum of its proper divisors (1).

426637 is an equidigital number, since it uses as much as digits as its factorization.

426637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 426637 is about 653.1745555363. The cubic root of 426637 is about 75.2811374324.

The spelling of 426637 in words is "four hundred twenty-six thousand, six hundred thirty-seven".