649244677 has 2 divisors, whose sum is σ = 649244678. Its totient is φ = 649244676.

The previous prime is 649244639. The next prime is 649244737. The reversal of 649244677 is 776442946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 554649601 + 94595076 = 23551^2 + 9726^2 .

It is a cyclic number.

It is not a de Polignac number, because 649244677 - 2⁷ = 649244549 is a prime.

It is a super-2 number, since 2×649244677² = 843037301225668658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649244677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649244627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324622338 + 324622339.

It is an arithmetic number, because the mean of its divisors is an integer number (324622339).

Almost surely, 2^649244677 is an apocalyptic number.

It is an amenable number.

649244677 is a deficient number, since it is larger than the sum of its proper divisors (1).

649244677 is an equidigital number, since it uses as much as digits as its factorization.

649244677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 49.

The square root of 649244677 is about 25480.2801593703. The cubic root of 649244677 is about 865.9034417924.

The spelling of 649244677 in words is "six hundred forty-nine million, two hundred forty-four thousand, six hundred seventy-seven".