420746173 has 4 divisors (see below), whose sum is σ = 425815488. Its totient is φ = 415676860.

The previous prime is 420746159. The next prime is 420746191. The reversal of 420746173 is 371647024.

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 a de Polignac number, because none of the positive numbers 2^k-420746173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420746113) 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, 2534533 + ... + 2534698.

It is an arithmetic number, because the mean of its divisors is an integer number (106453872).

Almost surely, 2^420746173 is an apocalyptic number.

It is an amenable number.

420746173 is a deficient number, since it is larger than the sum of its proper divisors (5069315).

420746173 is an equidigital number, since it uses as much as digits as its factorization.

420746173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069314.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 420746173 is about 20512.0982105683. The cubic root of 420746173 is about 749.3304679618.

The spelling of 420746173 in words is "four hundred twenty million, seven hundred forty-six thousand, one hundred seventy-three".