649597005 has 12 divisors (see below), whose sum is σ = 1125968220. Its totient is φ = 346451712.

The previous prime is 649596977. The next prime is 649597009. The reversal of 649597005 is 500795946.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68112009 + 581484996 = 8253^2 + 24114^2 .

It is not a de Polignac number, because 649597005 - 2¹³ = 649588813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14435489 = 649597005 / (6 + 4 + 9 + 5 + 9 + 7 + 0 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649597009) 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, 7217700 + ... + 7217789.

It is an arithmetic number, because the mean of its divisors is an integer number (93830685).

Almost surely, 2^649597005 is an apocalyptic number.

It is an amenable number.

649597005 is a deficient number, since it is larger than the sum of its proper divisors (476371215).

649597005 is a wasteful number, since it uses less digits than its factorization.

649597005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14435500 (or 14435497 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 649597005 is about 25487.1929603870. The cubic root of 649597005 is about 866.0600478037.

The spelling of 649597005 in words is "six hundred forty-nine million, five hundred ninety-seven thousand, five".