426643037 has 2 divisors, whose sum is σ = 426643038. Its totient is φ = 426643036.

The previous prime is 426643013. The next prime is 426643039. The reversal of 426643037 is 730346624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419184676 + 7458361 = 20474^2 + 2731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426643037 is a prime.

Together with 426643039, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 426642988 and 426643006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426643039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213321518 + 213321519.

It is an arithmetic number, because the mean of its divisors is an integer number (213321519).

Almost surely, 2^426643037 is an apocalyptic number.

It is an amenable number.

426643037 is a deficient number, since it is larger than the sum of its proper divisors (1).

426643037 is an equidigital number, since it uses as much as digits as its factorization.

426643037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 426643037 is about 20655.3391886940. The cubic root of 426643037 is about 752.8149251185.

The spelling of 426643037 in words is "four hundred twenty-six million, six hundred forty-three thousand, thirty-seven".