649377 has 10 divisors (see below), whose sum is σ = 970178. Its totient is φ = 432864.

The previous prime is 649361. The next prime is 649379. The reversal of 649377 is 773946.

649377 is a `hidden beast` number, since 649 + 3 + 7 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 571536 + 77841 = 756^2 + 279^2 .

It is not a de Polignac number, because 649377 - 2⁴ = 649361 is a prime.

It is a Duffinian number.

649377 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (649379) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3928 + ... + 4089.

2⁶⁴⁹³⁷⁷ is an apocalyptic number.

It is an amenable number.

649377 is a deficient number, since it is larger than the sum of its proper divisors (320801).

649377 is an equidigital number, since it uses as much as digits as its factorization.

649377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8029 (or 8020 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 649377 is about 805.8393140075. The cubic root of 649377 is about 86.5962264586.

The spelling of 649377 in words is "six hundred forty-nine thousand, three hundred seventy-seven".