649893047 has 2 divisors, whose sum is σ = 649893048. Its totient is φ = 649893046.

The previous prime is 649893031. The next prime is 649893053. The reversal of 649893047 is 740398946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649893047 - 2⁴ = 649893031 is a prime.

It is a super-3 number, since 3×649893047³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649892986 and 649893004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649893007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324946523 + 324946524.

It is an arithmetic number, because the mean of its divisors is an integer number (324946524).

Almost surely, 2^649893047 is an apocalyptic number.

649893047 is a deficient number, since it is larger than the sum of its proper divisors (1).

649893047 is an equidigital number, since it uses as much as digits as its factorization.

649893047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 649893047 is about 25492.9999607735. Note that the first 4 decimals coincide. The cubic root of 649893047 is about 866.1915915189.

The spelling of 649893047 in words is "six hundred forty-nine million, eight hundred ninety-three thousand, forty-seven".