416608921 has 3 divisors (see below), whose sum is σ = 416629333. Its totient is φ = 416588510.

The previous prime is 416608909. The next prime is 416608931. The reversal of 416608921 is 129806614.

It is a happy number.

The square root of 416608921 is 20411.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 416608921 - 2¹¹ = 416606873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (416608931) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10206 + ... + 30616.

Almost surely, 2^416608921 is an apocalyptic number.

416608921 is the 20411-st square number.

416608921 is the 10206-th centered octagonal number.

It is an amenable number.

416608921 is a deficient number, since it is larger than the sum of its proper divisors (20412).

416608921 is an frugal number, since it uses more digits than its factorization.

416608921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40822 (or 20411 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The cubic root of 416608921 is about 746.8662852715.

Multiplying 416608921 by its product of nonzero digits (20736), we get a square (8638802585856 = 2939184²).

The spelling of 416608921 in words is "four hundred sixteen million, six hundred eight thousand, nine hundred twenty-one".