920684459 has 4 divisors (see below), whose sum is σ = 923193504. Its totient is φ = 918175416.

The previous prime is 920684449. The next prime is 920684491. The reversal of 920684459 is 954486029.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920684459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920684449) 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, 1253972 + ... + 1254705.

It is an arithmetic number, because the mean of its divisors is an integer number (230798376).

Almost surely, 2^920684459 is an apocalyptic number.

920684459 is a deficient number, since it is larger than the sum of its proper divisors (2509045).

920684459 is a wasteful number, since it uses less digits than its factorization.

920684459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509044.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 920684459 is about 30342.7826509040. The cubic root of 920684459 is about 972.8299610579.

The spelling of 920684459 in words is "nine hundred twenty million, six hundred eighty-four thousand, four hundred fifty-nine".