649893203 has 2 divisors, whose sum is σ = 649893204. Its totient is φ = 649893202.

The previous prime is 649893199. The next prime is 649893247. The reversal of 649893203 is 302398946.

It is an a-pointer prime, because the next prime (649893247) can be obtained adding 649893203 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649893203 - 2² = 649893199 is a prime.

It is a super-2 number, since 2×649893203² = 844722350611198418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (649895203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324946601 + 324946602.

It is an arithmetic number, because the mean of its divisors is an integer number (324946602).

Almost surely, 2^649893203 is an apocalyptic number.

649893203 is a deficient number, since it is larger than the sum of its proper divisors (1).

649893203 is an equidigital number, since it uses as much as digits as its factorization.

649893203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 649893203 is about 25493.0030204368. The cubic root of 649893203 is about 866.1916608256.

The spelling of 649893203 in words is "six hundred forty-nine million, eight hundred ninety-three thousand, two hundred three".