648951 has 4 divisors (see below), whose sum is σ = 865272. Its totient is φ = 432632.

The previous prime is 648937. The next prime is 648953. The reversal of 648951 is 159846.

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 648951 - 2⁶ = 648887 is a prime.

It is a super-2 number, since 2×648951² = 842274800802, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648951.

It is not an unprimeable number, because it can be changed into a prime (648953) 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, 108156 + ... + 108161.

It is an arithmetic number, because the mean of its divisors is an integer number (216318).

2⁶⁴⁸⁹⁵¹ is an apocalyptic number.

648951 is a deficient number, since it is larger than the sum of its proper divisors (216321).

648951 is a wasteful number, since it uses less digits than its factorization.

648951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216320.

The product of its digits is 8640, while the sum is 33.

The square root of 648951 is about 805.5749499581. The cubic root of 648951 is about 86.5772862220.

The spelling of 648951 in words is "six hundred forty-eight thousand, nine hundred fifty-one".