906649 has 2 divisors, whose sum is σ = 906650. Its totient is φ = 906648.

The previous prime is 906641. The next prime is 906673. The reversal of 906649 is 946609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 38025 = 932^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 906649 - 2³ = 906641 is a prime.

It is not a weakly prime, because it can be changed into another prime (906641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453324 + 453325.

It is an arithmetic number, because the mean of its divisors is an integer number (453325).

2⁹⁰⁶⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

906649 is a deficient number, since it is larger than the sum of its proper divisors (1).

906649 is an equidigital number, since it uses as much as digits as its factorization.

906649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 906649 is about 952.1811802383. The cubic root of 906649 is about 96.7861160448.

The spelling of 906649 in words is "nine hundred six thousand, six hundred forty-nine".