648437 has 2 divisors, whose sum is σ = 648438. Its totient is φ = 648436.

The previous prime is 648433. The next prime is 648449. The reversal of 648437 is 734846.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376996 + 271441 = 614^2 + 521^2 .

It is a cyclic number.

It is not a de Polignac number, because 648437 - 2² = 648433 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324218 + 324219.

It is an arithmetic number, because the mean of its divisors is an integer number (324219).

2⁶⁴⁸⁴³⁷ is an apocalyptic number.

It is an amenable number.

648437 is a deficient number, since it is larger than the sum of its proper divisors (1).

648437 is an equidigital number, since it uses as much as digits as its factorization.

648437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 648437 is about 805.2558599601. The cubic root of 648437 is about 86.5544224109.

The spelling of 648437 in words is "six hundred forty-eight thousand, four hundred thirty-seven".