649179313 has 2 divisors, whose sum is σ = 649179314. Its totient is φ = 649179312.

The previous prime is 649179283. The next prime is 649179317. The reversal of 649179313 is 313971946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636704289 + 12475024 = 25233^2 + 3532^2 .

It is a cyclic number.

It is not a de Polignac number, because 649179313 - 2²⁹ = 112308401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649179313.

It is not a weakly prime, because it can be changed into another prime (649179317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324589656 + 324589657.

It is an arithmetic number, because the mean of its divisors is an integer number (324589657).

Almost surely, 2^649179313 is an apocalyptic number.

It is an amenable number.

649179313 is a deficient number, since it is larger than the sum of its proper divisors (1).

649179313 is an equidigital number, since it uses as much as digits as its factorization.

649179313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 649179313 is about 25478.9974881274. The cubic root of 649179313 is about 865.8743819663.

The spelling of 649179313 in words is "six hundred forty-nine million, one hundred seventy-nine thousand, three hundred thirteen".