421903617 has 8 divisors (see below), whose sum is σ = 563256096. Its totient is φ = 280910112.

The previous prime is 421903609. The next prime is 421903619. The reversal of 421903617 is 716309124.

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

It is not a de Polignac number, because 421903617 - 2³ = 421903609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421903619) by changing a digit.

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, 86988 + ... + 91709.

It is an arithmetic number, because the mean of its divisors is an integer number (70407012).

Almost surely, 2^421903617 is an apocalyptic number.

It is an amenable number.

421903617 is a deficient number, since it is larger than the sum of its proper divisors (141352479).

421903617 is a wasteful number, since it uses less digits than its factorization.

421903617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179487.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 421903617 is about 20540.2925246940. The cubic root of 421903617 is about 750.0169578388.

The spelling of 421903617 in words is "four hundred twenty-one million, nine hundred three thousand, six hundred seventeen".