420353553 has 4 divisors (see below), whose sum is σ = 560471408. Its totient is φ = 280235700.

The previous prime is 420353551. The next prime is 420353573. The reversal of 420353553 is 355353024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 420353553 - 2¹ = 420353551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420353553.

It is not an unprimeable number, because it can be changed into a prime (420353551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70058923 + ... + 70058928.

It is an arithmetic number, because the mean of its divisors is an integer number (140117852).

Almost surely, 2^420353553 is an apocalyptic number.

It is an amenable number.

420353553 is a deficient number, since it is larger than the sum of its proper divisors (140117855).

420353553 is a wasteful number, since it uses less digits than its factorization.

420353553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140117854.

The product of its (nonzero) digits is 27000, while the sum is 30.

The square root of 420353553 is about 20502.5255273588. The cubic root of 420353553 is about 749.0973157619.

The spelling of 420353553 in words is "four hundred twenty million, three hundred fifty-three thousand, five hundred fifty-three".