6393977 has 4 divisors (see below), whose sum is σ = 6672000. Its totient is φ = 6115956.

The previous prime is 6393953. The next prime is 6393983. The reversal of 6393977 is 7793936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6393977 - 2⁶ = 6393913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6393917) 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, 138977 + ... + 139022.

It is an arithmetic number, because the mean of its divisors is an integer number (1668000).

Almost surely, 2^6393977 is an apocalyptic number.

It is an amenable number.

6393977 is a deficient number, since it is larger than the sum of its proper divisors (278023).

6393977 is a wasteful number, since it uses less digits than its factorization.

6393977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278022.

The product of its digits is 214326, while the sum is 44.

The square root of 6393977 is about 2528.6314480367. The cubic root of 6393977 is about 185.6052927946.

The spelling of 6393977 in words is "six million, three hundred ninety-three thousand, nine hundred seventy-seven".