6420963 has 16 divisors (see below), whose sum is σ = 8781696. Its totient is φ = 4172160.

The previous prime is 6420961. The next prime is 6420971. The reversal of 6420963 is 3690246.

It is not a de Polignac number, because 6420963 - 2¹ = 6420961 is a prime.

6420963 is a modest number, since divided by 963 gives 642 as remainder.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 6420963.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26523 + ... + 26763.

It is an arithmetic number, because the mean of its divisors is an integer number (548856).

Almost surely, 2^6420963 is an apocalyptic number.

6420963 is a deficient number, since it is larger than the sum of its proper divisors (2360733).

6420963 is a wasteful number, since it uses less digits than its factorization.

6420963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 6420963 is about 2533.9619176302. The cubic root of 6420963 is about 185.8660441434.

The spelling of 6420963 in words is "six million, four hundred twenty thousand, nine hundred sixty-three".