649208341 has 2 divisors, whose sum is σ = 649208342. Its totient is φ = 649208340.

The previous prime is 649208323. The next prime is 649208353. The reversal of 649208341 is 143802946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649179441 + 28900 = 25479^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 649208341 - 2⁹ = 649207829 is a prime.

It is a super-3 number, since 3×649208341³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649208341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649208311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324604170 + 324604171.

It is an arithmetic number, because the mean of its divisors is an integer number (324604171).

Almost surely, 2^649208341 is an apocalyptic number.

It is an amenable number.

649208341 is a deficient number, since it is larger than the sum of its proper divisors (1).

649208341 is an equidigital number, since it uses as much as digits as its factorization.

649208341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 649208341 is about 25479.5671274062. The cubic root of 649208341 is about 865.8872876081.

The spelling of 649208341 in words is "six hundred forty-nine million, two hundred eight thousand, three hundred forty-one".