649255043 has 2 divisors, whose sum is σ = 649255044. Its totient is φ = 649255042.

The previous prime is 649255003. The next prime is 649255051. The reversal of 649255043 is 340552946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649255043 - 2²² = 645060739 is a prime.

It is a super-2 number, since 2×649255043² = 843064221721863698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649254988 and 649255006.

It is not a weakly prime, because it can be changed into another prime (649255003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324627521 + 324627522.

It is an arithmetic number, because the mean of its divisors is an integer number (324627522).

Almost surely, 2^649255043 is an apocalyptic number.

649255043 is a deficient number, since it is larger than the sum of its proper divisors (1).

649255043 is an equidigital number, since it uses as much as digits as its factorization.

649255043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 649255043 is about 25480.4835707645. The cubic root of 649255043 is about 865.9080501768.

The spelling of 649255043 in words is "six hundred forty-nine million, two hundred fifty-five thousand, forty-three".