849226649 has 2 divisors, whose sum is σ = 849226650. Its totient is φ = 849226648.

The previous prime is 849226639. The next prime is 849226663. The reversal of 849226649 is 946622948.

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., 816816400 + 32410249 = 28580^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 849226649 - 2¹⁶ = 849161113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 849226597 and 849226606.

It is not a weakly prime, because it can be changed into another prime (849226639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424613324 + 424613325.

It is an arithmetic number, because the mean of its divisors is an integer number (424613325).

Almost surely, 2^849226649 is an apocalyptic number.

It is an amenable number.

849226649 is a deficient number, since it is larger than the sum of its proper divisors (1).

849226649 is an equidigital number, since it uses as much as digits as its factorization.

849226649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 50.

The square root of 849226649 is about 29141.4935959020. The cubic root of 849226649 is about 946.9808673345.

The spelling of 849226649 in words is "eight hundred forty-nine million, two hundred twenty-six thousand, six hundred forty-nine".