649325279 has 2 divisors, whose sum is σ = 649325280. Its totient is φ = 649325278.

The previous prime is 649325273. The next prime is 649325309. The reversal of 649325279 is 972523946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649325279 - 2²⁰ = 648276703 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649325273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324662639 + 324662640.

It is an arithmetic number, because the mean of its divisors is an integer number (324662640).

Almost surely, 2^649325279 is an apocalyptic number.

649325279 is a deficient number, since it is larger than the sum of its proper divisors (1).

649325279 is an equidigital number, since it uses as much as digits as its factorization.

649325279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 649325279 is about 25481.8617647926. The cubic root of 649325279 is about 865.9392735127.

The spelling of 649325279 in words is "six hundred forty-nine million, three hundred twenty-five thousand, two hundred seventy-nine".