649893050 has 24 divisors (see below), whose sum is σ = 1238287932. Its totient is φ = 253616000.

The previous prime is 649893047. The next prime is 649893053. The reversal of 649893050 is 50398946.

It is a Cunningham number, because it is equal to 25493²+1.

It is an interprime number because it is at equal distance from previous prime (649893047) and next prime (649893053).

It can be written as a sum of positive squares in 6 ways, for example, as 31326409 + 618566641 = 5597^2 + 24871^2 .

It is a junction number, because it is equal to n+sod(n) for n = 649892992 and 649893010.

It is not an unprimeable number, because it can be changed into a prime (649893053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156461 + ... + 160560.

Almost surely, 2^649893050 is an apocalyptic number.

649893050 is a deficient number, since it is larger than the sum of its proper divisors (588394882).

649893050 is a wasteful number, since it uses less digits than its factorization.

649893050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317074 (or 317069 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 649893050 is about 25493.0000196132. Note that the first 4 decimals coincide. The cubic root of 649893050 is about 866.1915928517.

The spelling of 649893050 in words is "six hundred forty-nine million, eight hundred ninety-three thousand, fifty".