421216697 has 8 divisors (see below), whose sum is σ = 459730560. Its totient is φ = 382739760.

The previous prime is 421216673. The next prime is 421216699. The reversal of 421216697 is 796612124.

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

It is a cyclic number.

It is not a de Polignac number, because 421216697 - 2¹⁸ = 420954553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421216697.

It is not an unprimeable number, because it can be changed into a prime (421216699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18179 + ... + 34247.

It is an arithmetic number, because the mean of its divisors is an integer number (57466320).

Almost surely, 2^421216697 is an apocalyptic number.

It is an amenable number.

421216697 is a deficient number, since it is larger than the sum of its proper divisors (38513863).

421216697 is a wasteful number, since it uses less digits than its factorization.

421216697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18463.

The product of its digits is 36288, while the sum is 38.

The square root of 421216697 is about 20523.5644321351. The cubic root of 421216697 is about 749.6096914327.

The spelling of 421216697 in words is "four hundred twenty-one million, two hundred sixteen thousand, six hundred ninety-seven".