420450917 has 4 divisors (see below), whose sum is σ = 420514176. Its totient is φ = 420387660.

The previous prime is 420450907. The next prime is 420450937. The reversal of 420450917 is 719054024.

It is a happy number.

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 420450917 - 2¹⁰ = 420449893 is a prime.

It is a super-2 number, since 2×420450917² = 353557947212281778, 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 (420450907) 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, 20309 + ... + 35402.

It is an arithmetic number, because the mean of its divisors is an integer number (105128544).

Almost surely, 2^420450917 is an apocalyptic number.

It is an amenable number.

420450917 is a deficient number, since it is larger than the sum of its proper divisors (63259).

420450917 is an equidigital number, since it uses as much as digits as its factorization.

420450917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63258.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 420450917 is about 20504.8998290652. The cubic root of 420450917 is about 749.1551476196.

The spelling of 420450917 in words is "four hundred twenty million, four hundred fifty thousand, nine hundred seventeen".