6420319 has 4 divisors (see below), whose sum is σ = 6428160. Its totient is φ = 6412480.

The previous prime is 6420307. The next prime is 6420343. The reversal of 6420319 is 9130246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6420319 - 2⁹ = 6419807 is a prime.

It is a super-2 number, since 2×6420319² = 82440992123522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6420293 and 6420302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420389) 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, 2527 + ... + 4384.

It is an arithmetic number, because the mean of its divisors is an integer number (1607040).

Almost surely, 2^6420319 is an apocalyptic number.

6420319 is a deficient number, since it is larger than the sum of its proper divisors (7841).

6420319 is an equidigital number, since it uses as much as digits as its factorization.

6420319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 6420319 is about 2533.8348407108. The cubic root of 6420319 is about 185.8598300322.

The spelling of 6420319 in words is "six million, four hundred twenty thousand, three hundred nineteen".