6390243 has 6 divisors (see below), whose sum is σ = 9230364. Its totient is φ = 4260156.

The previous prime is 6390239. The next prime is 6390257. The reversal of 6390243 is 3420936.

6390243 is a `hidden beast` number, since 639 + 0 + 24 + 3 = 666.

It is not a de Polignac number, because 6390243 - 2² = 6390239 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6390443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355005 + ... + 355022.

It is an arithmetic number, because the mean of its divisors is an integer number (1538394).

Almost surely, 2^6390243 is an apocalyptic number.

6390243 is a deficient number, since it is larger than the sum of its proper divisors (2840121).

6390243 is a wasteful number, since it uses less digits than its factorization.

6390243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710033 (or 710030 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 6390243 is about 2527.8929961531. The cubic root of 6390243 is about 185.5691553944.

The spelling of 6390243 in words is "six million, three hundred ninety thousand, two hundred forty-three".