649179449 has 2 divisors, whose sum is σ = 649179450. Its totient is φ = 649179448.

The previous prime is 649179373. The next prime is 649179451. The reversal of 649179449 is 944971946.

649179449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390773824 + 258405625 = 19768^2 + 16075^2 .

It is a cyclic number.

It is not a de Polignac number, because 649179449 - 2²⁴ = 632402233 is a prime.

Together with 649179451, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649179449.

It is not a weakly prime, because it can be changed into another prime (649179499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324589724 + 324589725.

It is an arithmetic number, because the mean of its divisors is an integer number (324589725).

Almost surely, 2^649179449 is an apocalyptic number.

It is an amenable number.

649179449 is a deficient number, since it is larger than the sum of its proper divisors (1).

649179449 is an equidigital number, since it uses as much as digits as its factorization.

649179449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 649179449 is about 25479.0001569920. Note that the first 3 decimals coincide. The cubic root of 649179449 is about 865.8744424319.

The spelling of 649179449 in words is "six hundred forty-nine million, one hundred seventy-nine thousand, four hundred forty-nine".