420713189 has 4 divisors (see below), whose sum is σ = 453075756. Its totient is φ = 388350624.

The previous prime is 420713149. The next prime is 420713197. The reversal of 420713189 is 981317024.

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 260564164 + 160149025 = 16142^2 + 12655^2 .

It is a cyclic number.

It is not a de Polignac number, because 420713189 - 2¹⁶ = 420647653 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 (420713149) 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, 16181264 + ... + 16181289.

It is an arithmetic number, because the mean of its divisors is an integer number (113268939).

Almost surely, 2^420713189 is an apocalyptic number.

It is an amenable number.

420713189 is a deficient number, since it is larger than the sum of its proper divisors (32362567).

420713189 is a wasteful number, since it uses less digits than its factorization.

420713189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32362566.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 420713189 is about 20511.2941814991. The cubic root of 420713189 is about 749.3108864313.

The spelling of 420713189 in words is "four hundred twenty million, seven hundred thirteen thousand, one hundred eighty-nine".