420692905 has 8 divisors (see below), whose sum is σ = 513107784. Its totient is φ = 331036800.

The previous prime is 420692861. The next prime is 420692969. The reversal of 420692905 is 509296024.

It can be written as a sum of positive squares in 4 ways, for example, as 1590121 + 419102784 = 1261^2 + 20472^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-420692905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689356 + ... + 689965.

It is an arithmetic number, because the mean of its divisors is an integer number (64138473).

Almost surely, 2^420692905 is an apocalyptic number.

It is an amenable number.

420692905 is a deficient number, since it is larger than the sum of its proper divisors (92414879).

420692905 is a wasteful number, since it uses less digits than its factorization.

420692905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379387.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 420692905 is about 20510.7997162470. The cubic root of 420692905 is about 749.2988439705.

The spelling of 420692905 in words is "four hundred twenty million, six hundred ninety-two thousand, nine hundred five".