6420347 has 8 divisors (see below), whose sum is σ = 6782160. Its totient is φ = 6060960.

The previous prime is 6420343. The next prime is 6420353. The reversal of 6420347 is 7430246.

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 6420347 - 2² = 6420343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420343) 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, 8393 + ... + 9125.

It is an arithmetic number, because the mean of its divisors is an integer number (847770).

Almost surely, 2^6420347 is an apocalyptic number.

6420347 is a deficient number, since it is larger than the sum of its proper divisors (361813).

6420347 is a wasteful number, since it uses less digits than its factorization.

6420347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 6420347 is about 2533.8403659268. The cubic root of 6420347 is about 185.8601002196.

The spelling of 6420347 in words is "six million, four hundred twenty thousand, three hundred forty-seven".