420938417 has 4 divisors (see below), whose sum is σ = 421040676. Its totient is φ = 420836160.

The previous prime is 420938383. The next prime is 420938423. The reversal of 420938417 is 714839024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157979761 + 262958656 = 12569^2 + 16216^2 .

It is a cyclic number.

It is not a de Polignac number, because 420938417 - 2²⁴ = 404161201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420938017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44684 + ... + 53277.

It is an arithmetic number, because the mean of its divisors is an integer number (105260169).

Almost surely, 2^420938417 is an apocalyptic number.

It is an amenable number.

420938417 is a deficient number, since it is larger than the sum of its proper divisors (102259).

420938417 is an equidigital number, since it uses as much as digits as its factorization.

420938417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102258.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 420938417 is about 20516.7837879137. The cubic root of 420938417 is about 749.4445766266. Note that the first 3 decimals are identical.

The spelling of 420938417 in words is "four hundred twenty million, nine hundred thirty-eight thousand, four hundred seventeen".