649759379 has 4 divisors (see below), whose sum is σ = 655509576. Its totient is φ = 644009184.

The previous prime is 649759351. The next prime is 649759393. The reversal of 649759379 is 973957946.

649759379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649759379 - 2¹⁶ = 649693843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649759339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2874929 + ... + 2875154.

It is an arithmetic number, because the mean of its divisors is an integer number (163877394).

Almost surely, 2^649759379 is an apocalyptic number.

649759379 is a deficient number, since it is larger than the sum of its proper divisors (5750197).

649759379 is a wasteful number, since it uses less digits than its factorization.

649759379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5750196.

The product of its digits is 12859560, while the sum is 59.

The square root of 649759379 is about 25490.3781651038. The cubic root of 649759379 is about 866.1322022409.

The spelling of 649759379 in words is "six hundred forty-nine million, seven hundred fifty-nine thousand, three hundred seventy-nine".