648229783 has 4 divisors (see below), whose sum is σ = 682347160. Its totient is φ = 614112408.

The previous prime is 648229759. The next prime is 648229807. The reversal of 648229783 is 387922846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387922846 = 2 ⋅193961423.

It is an interprime number because it is at equal distance from previous prime (648229759) and next prime (648229807).

It is a cyclic number.

It is not a de Polignac number, because 648229783 - 2⁹ = 648229271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648229753) 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, 17058660 + ... + 17058697.

It is an arithmetic number, because the mean of its divisors is an integer number (170586790).

Almost surely, 2^648229783 is an apocalyptic number.

648229783 is a deficient number, since it is larger than the sum of its proper divisors (34117377).

648229783 is a wasteful number, since it uses less digits than its factorization.

648229783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34117376.

The product of its digits is 1161216, while the sum is 49.

The square root of 648229783 is about 25460.3570870481. The cubic root of 648229783 is about 865.4520154154.

The spelling of 648229783 in words is "six hundred forty-eight million, two hundred twenty-nine thousand, seven hundred eighty-three".