420071653 has 2 divisors, whose sum is σ = 420071654. Its totient is φ = 420071652.

The previous prime is 420071629. The next prime is 420071689. The reversal of 420071653 is 356170024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408120804 + 11950849 = 20202^2 + 3457^2 .

It is a cyclic number.

It is not a de Polignac number, because 420071653 - 2²⁵ = 386517221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420071623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210035826 + 210035827.

It is an arithmetic number, because the mean of its divisors is an integer number (210035827).

Almost surely, 2^420071653 is an apocalyptic number.

It is an amenable number.

420071653 is a deficient number, since it is larger than the sum of its proper divisors (1).

420071653 is an equidigital number, since it uses as much as digits as its factorization.

420071653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 420071653 is about 20495.6496115639. The cubic root of 420071653 is about 748.9298236156.

It can be divided in two parts, 42007 and 1653, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 420071653 in words is "four hundred twenty million, seventy-one thousand, six hundred fifty-three".