649975727 has 2 divisors, whose sum is σ = 649975728. Its totient is φ = 649975726.

The previous prime is 649975663. The next prime is 649975741. The reversal of 649975727 is 727579946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649975727 - 2⁶ = 649975663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649975787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324987863 + 324987864.

It is an arithmetic number, because the mean of its divisors is an integer number (324987864).

Almost surely, 2^649975727 is an apocalyptic number.

649975727 is a deficient number, since it is larger than the sum of its proper divisors (1).

649975727 is an equidigital number, since it uses as much as digits as its factorization.

649975727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6667920, while the sum is 56.

The square root of 649975727 is about 25494.6215308249. The cubic root of 649975727 is about 866.2283225288.

The spelling of 649975727 in words is "six hundred forty-nine million, nine hundred seventy-five thousand, seven hundred twenty-seven".