649341247 has 2 divisors, whose sum is σ = 649341248. Its totient is φ = 649341246.

The previous prime is 649341191. The next prime is 649341269. The reversal of 649341247 is 742143946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649341247 - 2¹⁵ = 649308479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649341047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324670623 + 324670624.

It is an arithmetic number, because the mean of its divisors is an integer number (324670624).

Almost surely, 2^649341247 is an apocalyptic number.

649341247 is a deficient number, since it is larger than the sum of its proper divisors (1).

649341247 is an equidigital number, since it uses as much as digits as its factorization.

649341247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 649341247 is about 25482.1750837718. The cubic root of 649341247 is about 865.9463717553.

The spelling of 649341247 in words is "six hundred forty-nine million, three hundred forty-one thousand, two hundred forty-seven".