649077529 has 9 divisors (see below), whose sum is σ = 659981853. Its totient is φ = 638351712.

The previous prime is 649077511. The next prime is 649077547. The reversal of 649077529 is 925770946.

The square root of 649077529 is 25477.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (649077511) and next prime (649077547).

It can be written as a sum of positive squares in 4 ways, for example, as 60918025 + 588159504 = 7805^2 + 24252^2 .

It is not a de Polignac number, because 649077529 - 2⁵ = 649077497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649077589) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1859647 + ... + 1859995.

It is an arithmetic number, because the mean of its divisors is an integer number (73331317).

Almost surely, 2^649077529 is an apocalyptic number.

649077529 is the 25477-th square number.

649077529 is the 12739-th centered octagonal number.

It is an amenable number.

649077529 is a deficient number, since it is larger than the sum of its proper divisors (10904324).

649077529 is an frugal number, since it uses more digits than its factorization.

649077529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 49.

The cubic root of 649077529 is about 865.8291264862.

Multiplying 649077529 by its sum of digits (49), we get a square (31804798921 = 178339²).

The spelling of 649077529 in words is "six hundred forty-nine million, seventy-seven thousand, five hundred twenty-nine".