420852389 has 2 divisors, whose sum is σ = 420852390. Its totient is φ = 420852388.

The previous prime is 420852343. The next prime is 420852401. The reversal of 420852389 is 983258024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401200900 + 19651489 = 20030^2 + 4433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420852389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420852329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210426194 + 210426195.

It is an arithmetic number, because the mean of its divisors is an integer number (210426195).

Almost surely, 2^420852389 is an apocalyptic number.

It is an amenable number.

420852389 is a deficient number, since it is larger than the sum of its proper divisors (1).

420852389 is an equidigital number, since it uses as much as digits as its factorization.

420852389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 420852389 is about 20514.6871533543. The cubic root of 420852389 is about 749.3935180013.

The spelling of 420852389 in words is "four hundred twenty million, eight hundred fifty-two thousand, three hundred eighty-nine".