6351993 has 16 divisors (see below), whose sum is σ = 9715200. Its totient is φ = 4097520.

The previous prime is 6351973. The next prime is 6352001. The reversal of 6351993 is 3991536.

6351993 is a `hidden beast` number, since 635 + 19 + 9 + 3 = 666.

6351993 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6351993 - 2⁶ = 6351929 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6351913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2958 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (607200).

Almost surely, 2^6351993 is an apocalyptic number.

It is an amenable number.

6351993 is a deficient number, since it is larger than the sum of its proper divisors (3363207).

6351993 is a wasteful number, since it uses less digits than its factorization.

6351993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629 (or 7623 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 6351993 is about 2520.3160516094. The cubic root of 6351993 is about 185.1981611742.

It can be divided in two parts, 635 and 1993, that added together give a triangular number (2628 = T₇₂).

The spelling of 6351993 in words is "six million, three hundred fifty-one thousand, nine hundred ninety-three".