648969 has 8 divisors (see below), whose sum is σ = 872160. Its totient is φ = 429216.

The previous prime is 648961. The next prime is 648971. The reversal of 648969 is 969846.

648969 is digitally balanced in base 2 and base 7, because in such bases 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 not a de Polignac number, because 648969 - 2³ = 648961 is a prime.

It is a super-2 number, since 2×648969² = 842321525922, which contains 22 as substring.

648969 is strictly pandigital in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 648969.

It is not an unprimeable number, because it can be changed into a prime (648961) 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, 379 + ... + 1200.

It is an arithmetic number, because the mean of its divisors is an integer number (109020).

2⁶⁴⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

648969 is a deficient number, since it is larger than the sum of its proper divisors (223191).

648969 is a wasteful number, since it uses less digits than its factorization.

648969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719.

The product of its digits is 93312, while the sum is 42.

The square root of 648969 is about 805.5861220254. The cubic root of 648969 is about 86.5780866814.

The spelling of 648969 in words is "six hundred forty-eight thousand, nine hundred sixty-nine".