6420907 has 2 divisors, whose sum is σ = 6420908. Its totient is φ = 6420906.

The previous prime is 6420901. The next prime is 6420913. The reversal of 6420907 is 7090246.

It is a balanced prime because it is at equal distance from previous prime (6420901) and next prime (6420913).

It is a cyclic number.

It is not a de Polignac number, because 6420907 - 2³ = 6420899 is a prime.

It is not a weakly prime, because it can be changed into another prime (6420901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210453 + 3210454.

It is an arithmetic number, because the mean of its divisors is an integer number (3210454).

Almost surely, 2^6420907 is an apocalyptic number.

6420907 is a deficient number, since it is larger than the sum of its proper divisors (1).

6420907 is an equidigital number, since it uses as much as digits as its factorization.

6420907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 6420907 is about 2533.9508677163. The cubic root of 6420907 is about 185.8655038024.

The spelling of 6420907 in words is "six million, four hundred twenty thousand, nine hundred seven".