6420407029 has 2 divisors, whose sum is σ = 6420407030. Its totient is φ = 6420407028.

The previous prime is 6420407023. The next prime is 6420407041. The reversal of 6420407029 is 9207040246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4714882225 + 1705524804 = 68665^2 + 41298^2 .

It is a cyclic number.

It is not a de Polignac number, because 6420407029 - 2⁵ = 6420406997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6420406985 and 6420407003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6420407023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210203514 + 3210203515.

It is an arithmetic number, because the mean of its divisors is an integer number (3210203515).

Almost surely, 2^6420407029 is an apocalyptic number.

It is an amenable number.

6420407029 is a deficient number, since it is larger than the sum of its proper divisors (1).

6420407029 is an equidigital number, since it uses as much as digits as its factorization.

6420407029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 6420407029 is about 80127.4424214326. The cubic root of 6420407029 is about 1858.6067946976.

It can be divided in two parts, 6420 and 407029, that added together give a square (413449 = 643²).

The spelling of 6420407029 in words is "six billion, four hundred twenty million, four hundred seven thousand, twenty-nine".