648733787 has 8 divisors (see below), whose sum is σ = 739732896. Its totient is φ = 563605632.

The previous prime is 648733763. The next prime is 648733793. The reversal of 648733787 is 787337846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648733787 - 2²⁰ = 647685211 is a prime.

It is a super-2 number, since 2×648733787² = 841711052790722738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648733717) 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, 1467503 + ... + 1467944.

It is an arithmetic number, because the mean of its divisors is an integer number (92466612).

Almost surely, 2^648733787 is an apocalyptic number.

648733787 is a deficient number, since it is larger than the sum of its proper divisors (90999109).

648733787 is a wasteful number, since it uses less digits than its factorization.

648733787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935477.

The product of its digits is 4741632, while the sum is 53.

The square root of 648733787 is about 25470.2529826462. The cubic root of 648733787 is about 865.6762560013.

The spelling of 648733787 in words is "six hundred forty-eight million, seven hundred thirty-three thousand, seven hundred eighty-seven".