648977 has 8 divisors (see below), whose sum is σ = 751296. Its totient is φ = 549072.

The previous prime is 648971. The next prime is 648997. The reversal of 648977 is 779846.

648977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648977 - 2⁴ = 648961 is a prime.

It is a super-2 number, since 2×648977² = 842342293058, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648977.

It is not an unprimeable number, because it can be changed into a prime (648971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23 + ... + 1139.

It is an arithmetic number, because the mean of its divisors is an integer number (93912).

2⁶⁴⁸⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

648977 is a deficient number, since it is larger than the sum of its proper divisors (102319).

648977 is a wasteful number, since it uses less digits than its factorization.

648977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207.

The product of its digits is 84672, while the sum is 41.

The square root of 648977 is about 805.5910873390. The cubic root of 648977 is about 86.5784424363.

The spelling of 648977 in words is "six hundred forty-eight thousand, nine hundred seventy-seven".