648942883 has 4 divisors (see below), whose sum is σ = 649111408. Its totient is φ = 648774360.

The previous prime is 648942881. The next prime is 648942913. The reversal of 648942883 is 388249846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 388249846 = 2 ⋅194124923.

It is a cyclic number.

It is not a de Polignac number, because 648942883 - 2¹ = 648942881 is a prime.

It is a super-2 number, since 2×648942883² = 842253730792703378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648942883.

It is not an unprimeable number, because it can be changed into a prime (648942881) 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, 78348 + ... + 86233.

It is an arithmetic number, because the mean of its divisors is an integer number (162277852).

Almost surely, 2^648942883 is an apocalyptic number.

648942883 is a deficient number, since it is larger than the sum of its proper divisors (168525).

648942883 is a wasteful number, since it uses less digits than its factorization.

648942883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168524.

The product of its digits is 2654208, while the sum is 52.

The square root of 648942883 is about 25474.3573618649. The cubic root of 648942883 is about 865.7692525443.

The spelling of 648942883 in words is "six hundred forty-eight million, nine hundred forty-two thousand, eight hundred eighty-three".