420196409 has 4 divisors (see below), whose sum is σ = 420805200. Its totient is φ = 419587620.

The previous prime is 420196397. The next prime is 420196433. The reversal of 420196409 is 904691024.

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 a cyclic number.

It is not a de Polignac number, because 420196409 - 2¹⁶ = 420130873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420193409) 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 in 3 ways as a sum of consecutive naturals, for example, 303359 + ... + 304740.

It is an arithmetic number, because the mean of its divisors is an integer number (105201300).

Almost surely, 2^420196409 is an apocalyptic number.

It is an amenable number.

420196409 is a deficient number, since it is larger than the sum of its proper divisors (608791).

420196409 is an equidigital number, since it uses as much as digits as its factorization.

420196409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608790.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 420196409 is about 20498.6928607655. The cubic root of 420196409 is about 749.0039571913.

The spelling of 420196409 in words is "four hundred twenty million, one hundred ninety-six thousand, four hundred nine".