920818409 has 8 divisors (see below), whose sum is σ = 1098119040. Its totient is φ = 754956576.

The previous prime is 920818403. The next prime is 920818417. The reversal of 920818409 is 904818029.

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 920818409 - 2⁸ = 920818153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920818403) 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, 2859524 + ... + 2859845.

It is an arithmetic number, because the mean of its divisors is an integer number (137264880).

Almost surely, 2^920818409 is an apocalyptic number.

It is an amenable number.

920818409 is a deficient number, since it is larger than the sum of its proper divisors (177300631).

920818409 is a wasteful number, since it uses less digits than its factorization.

920818409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719399.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 920818409 is about 30344.9898500560. The cubic root of 920818409 is about 972.8771376459.

The spelling of 920818409 in words is "nine hundred twenty million, eight hundred eighteen thousand, four hundred nine".