420684523 has 16 divisors (see below), whose sum is σ = 494968320. Its totient is φ = 350050176.

The previous prime is 420684521. The next prime is 420684541. The reversal of 420684523 is 325486024.

It is not a de Polignac number, because 420684523 - 2¹ = 420684521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420684521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46083 + ... + 54451.

It is an arithmetic number, because the mean of its divisors is an integer number (30935520).

Almost surely, 2^420684523 is an apocalyptic number.

420684523 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

420684523 is a deficient number, since it is larger than the sum of its proper divisors (74283797).

420684523 is a wasteful number, since it uses less digits than its factorization.

420684523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8586.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 420684523 is about 20510.5953838498. The cubic root of 420684523 is about 749.2938675260.

The spelling of 420684523 in words is "four hundred twenty million, six hundred eighty-four thousand, five hundred twenty-three".