420408269 has 4 divisors (see below), whose sum is σ = 442535040. Its totient is φ = 398281500.

The previous prime is 420408257. The next prime is 420408271. The reversal of 420408269 is 962804024.

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 420408269 - 2²⁸ = 151972813 is a prime.

It is a super-2 number, since 2×420408269² = 353486225287152722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420408229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11063357 + ... + 11063394.

It is an arithmetic number, because the mean of its divisors is an integer number (110633760).

Almost surely, 2^420408269 is an apocalyptic number.

It is an amenable number.

420408269 is a deficient number, since it is larger than the sum of its proper divisors (22126771).

420408269 is a wasteful number, since it uses less digits than its factorization.

420408269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22126770.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 420408269 is about 20503.8598561344. The cubic root of 420408269 is about 749.1298168396.

The spelling of 420408269 in words is "four hundred twenty million, four hundred eight thousand, two hundred sixty-nine".