649179953 has 2 divisors, whose sum is σ = 649179954. Its totient is φ = 649179952.

The previous prime is 649179919. The next prime is 649179961. The reversal of 649179953 is 359971946.

It is a happy number.

649179953 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., 424689664 + 224490289 = 20608^2 + 14983^2 .

It is a cyclic number.

It is not a de Polignac number, because 649179953 - 2²⁰ = 648131377 is a prime.

It is a super-2 number, since 2×649179953² = 842869222754164418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649179895 and 649179904.

It is not a weakly prime, because it can be changed into another prime (649179253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324589976 + 324589977.

It is an arithmetic number, because the mean of its divisors is an integer number (324589977).

Almost surely, 2^649179953 is an apocalyptic number.

It is an amenable number.

649179953 is a deficient number, since it is larger than the sum of its proper divisors (1).

649179953 is an equidigital number, since it uses as much as digits as its factorization.

649179953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 53.

The square root of 649179953 is about 25479.0100474881. The cubic root of 649179953 is about 865.8746665099.

The spelling of 649179953 in words is "six hundred forty-nine million, one hundred seventy-nine thousand, nine hundred fifty-three".