416678309 has 4 divisors (see below), whose sum is σ = 419437920. Its totient is φ = 413918700.

The previous prime is 416678261. The next prime is 416678329. The reversal of 416678309 is 903876614.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 416678309 - 2¹² = 416674213 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 416678309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (416678329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379579 + ... + 1379880.

It is an arithmetic number, because the mean of its divisors is an integer number (104859480).

Almost surely, 2^416678309 is an apocalyptic number.

It is an amenable number.

416678309 is a deficient number, since it is larger than the sum of its proper divisors (2759611).

416678309 is a wasteful number, since it uses less digits than its factorization.

416678309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759610.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 416678309 is about 20412.6996989619. The cubic root of 416678309 is about 746.9077475625.

The spelling of 416678309 in words is "four hundred sixteen million, six hundred seventy-eight thousand, three hundred nine".