425685437 has 2 divisors, whose sum is σ = 425685438. Its totient is φ = 425685436.

The previous prime is 425685427. The next prime is 425685499. The reversal of 425685437 is 734586524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299774596 + 125910841 = 17314^2 + 11221^2 .

It is a cyclic number.

It is not a de Polignac number, because 425685437 - 2¹² = 425681341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425685427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212842718 + 212842719.

It is an arithmetic number, because the mean of its divisors is an integer number (212842719).

Almost surely, 2^425685437 is an apocalyptic number.

It is an amenable number.

425685437 is a deficient number, since it is larger than the sum of its proper divisors (1).

425685437 is an equidigital number, since it uses as much as digits as its factorization.

425685437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 44.

The square root of 425685437 is about 20632.1457197258. The cubic root of 425685437 is about 752.2512723431.

The spelling of 425685437 in words is "four hundred twenty-five million, six hundred eighty-five thousand, four hundred thirty-seven".