648946 has 4 divisors (see below), whose sum is σ = 973422. Its totient is φ = 324472.

The previous prime is 648937. The next prime is 648953. The reversal of 648946 is 649846.

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

It can be written as a sum of positive squares in only one way, i.e., 373321 + 275625 = 611^2 + 525^2 .

It is a super-2 number, since 2×648946² = 842261821832, which contains 22 as substring.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162235 + ... + 162238.

2⁶⁴⁸⁹⁴⁶ is an apocalyptic number.

648946 is a deficient number, since it is larger than the sum of its proper divisors (324476).

648946 is a wasteful number, since it uses less digits than its factorization.

648946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324475.

The product of its digits is 41472, while the sum is 37.

The square root of 648946 is about 805.5718465786. The cubic root of 648946 is about 86.5770638695.

Subtracting 648946 from its reverse (649846), we obtain a square (900 = 30²).

The spelling of 648946 in words is "six hundred forty-eight thousand, nine hundred forty-six".