649041597 has 6 divisors (see below), whose sum is σ = 937504542. Its totient is φ = 432694392.

The previous prime is 649041571. The next prime is 649041629. The reversal of 649041597 is 795140946.

649041597 is a `hidden beast` number, since 6 + 490 + 4 + 159 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 533887236 + 115154361 = 23106^2 + 10731^2 .

It is not a de Polignac number, because 649041597 - 2¹⁴ = 649025213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649041557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36057858 + ... + 36057875.

It is an arithmetic number, because the mean of its divisors is an integer number (156250757).

Almost surely, 2^649041597 is an apocalyptic number.

It is an amenable number.

649041597 is a deficient number, since it is larger than the sum of its proper divisors (288462945).

649041597 is a wasteful number, since it uses less digits than its factorization.

649041597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72115739 (or 72115736 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 649041597 is about 25476.2948051713. The cubic root of 649041597 is about 865.8131491723.

The spelling of 649041597 in words is "six hundred forty-nine million, forty-one thousand, five hundred ninety-seven".