420199553 has 2 divisors, whose sum is σ = 420199554. Its totient is φ = 420199552.

The previous prime is 420199543. The next prime is 420199561. The reversal of 420199553 is 355991024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305131024 + 115068529 = 17468^2 + 10727^2 .

It is a cyclic number.

It is not a de Polignac number, because 420199553 - 2¹⁶ = 420134017 is a prime.

It is not a weakly prime, because it can be changed into another prime (420199543) 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, 210099776 + 210099777.

It is an arithmetic number, because the mean of its divisors is an integer number (210099777).

Almost surely, 2^420199553 is an apocalyptic number.

It is an amenable number.

420199553 is a deficient number, since it is larger than the sum of its proper divisors (1).

420199553 is an equidigital number, since it uses as much as digits as its factorization.

420199553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 420199553 is about 20498.7695484388. The cubic root of 420199553 is about 749.0058252563.

The spelling of 420199553 in words is "four hundred twenty million, one hundred ninety-nine thousand, five hundred fifty-three".