847272649 has 2 divisors, whose sum is σ = 847272650. Its totient is φ = 847272648.

The previous prime is 847272641. The next prime is 847272653. The reversal of 847272649 is 946272748.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660130249 + 187142400 = 25693^2 + 13680^2 .

It is a cyclic number.

It is not a de Polignac number, because 847272649 - 2³ = 847272641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (847272641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423636324 + 423636325.

It is an arithmetic number, because the mean of its divisors is an integer number (423636325).

Almost surely, 2^847272649 is an apocalyptic number.

It is an amenable number.

847272649 is a deficient number, since it is larger than the sum of its proper divisors (1).

847272649 is an equidigital number, since it uses as much as digits as its factorization.

847272649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The square root of 847272649 is about 29107.9482100680. The cubic root of 847272649 is about 946.2540014501.

Subtracting 847272649 from its reverse (946272748), we obtain a palindrome (99000099).

The spelling of 847272649 in words is "eight hundred forty-seven million, two hundred seventy-two thousand, six hundred forty-nine".