649738847 has 2 divisors, whose sum is σ = 649738848. Its totient is φ = 649738846.

The previous prime is 649738811. The next prime is 649738853. The reversal of 649738847 is 748837946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649738847 - 2⁶ = 649738783 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 649738792 and 649738801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649738867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324869423 + 324869424.

It is an arithmetic number, because the mean of its divisors is an integer number (324869424).

Almost surely, 2^649738847 is an apocalyptic number.

649738847 is a deficient number, since it is larger than the sum of its proper divisors (1).

649738847 is an equidigital number, since it uses as much as digits as its factorization.

649738847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 56.

The square root of 649738847 is about 25489.9754217222. The cubic root of 649738847 is about 866.1230790617.

Subtracting 649738847 from its reverse (748837946), we obtain a palindrome (99099099).

The spelling of 649738847 in words is "six hundred forty-nine million, seven hundred thirty-eight thousand, eight hundred forty-seven".