6391407 has 8 divisors (see below), whose sum is σ = 9296640. Its totient is φ = 3873560.

The previous prime is 6391387. The next prime is 6391409. The reversal of 6391407 is 7041936.

It is a happy number.

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 6391407 - 2¹⁴ = 6375023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391409) 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, 96807 + ... + 96872.

It is an arithmetic number, because the mean of its divisors is an integer number (1162080).

Almost surely, 2^6391407 is an apocalyptic number.

6391407 is a deficient number, since it is larger than the sum of its proper divisors (2905233).

6391407 is a wasteful number, since it uses less digits than its factorization.

6391407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193693.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 6391407 is about 2528.1232169339. The cubic root of 6391407 is about 185.5804220177.

The spelling of 6391407 in words is "six million, three hundred ninety-one thousand, four hundred seven".