6393961 has 6 divisors (see below), whose sum is σ = 7437930. Its totient is φ = 5480496.

The previous prime is 6393953. The next prime is 6393983. The reversal of 6393961 is 1693936.

It can be written as a sum of positive squares in only one way, i.e., 5433561 + 960400 = 2331^2 + 980^2 .

It is not a de Polignac number, because 6393961 - 2³ = 6393953 is a prime.

It is an Ulam number.

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 6393961.

It is not an unprimeable number, because it can be changed into a prime (6393911) 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, 65196 + ... + 65293.

It is an arithmetic number, because the mean of its divisors is an integer number (1239655).

Almost surely, 2^6393961 is an apocalyptic number.

It is an amenable number.

6393961 is a deficient number, since it is larger than the sum of its proper divisors (1043969).

6393961 is a wasteful number, since it uses less digits than its factorization.

6393961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130503 (or 130496 counting only the distinct ones).

The product of its digits is 26244, while the sum is 37.

The square root of 6393961 is about 2528.6282842680. The cubic root of 6393961 is about 185.6051379777.

It can be divided in two parts, 63939 and 61, that added together give a cube (64000 = 40³).

The spelling of 6393961 in words is "six million, three hundred ninety-three thousand, nine hundred sixty-one".