649454563 has 2 divisors, whose sum is σ = 649454564. Its totient is φ = 649454562.

The previous prime is 649454549. The next prime is 649454573. The reversal of 649454563 is 365454946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649454563 - 2¹⁷ = 649323491 is a prime.

It is not a weakly prime, because it can be changed into another prime (649454503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324727281 + 324727282.

It is an arithmetic number, because the mean of its divisors is an integer number (324727282).

Almost surely, 2^649454563 is an apocalyptic number.

649454563 is a deficient number, since it is larger than the sum of its proper divisors (1).

649454563 is an equidigital number, since it uses as much as digits as its factorization.

649454563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 46.

The square root of 649454563 is about 25484.3984233491. The cubic root of 649454563 is about 865.9967406854.

The spelling of 649454563 in words is "six hundred forty-nine million, four hundred fifty-four thousand, five hundred sixty-three".