920840873 has 4 divisors (see below), whose sum is σ = 940433280. Its totient is φ = 901248468.

The previous prime is 920840861. The next prime is 920840881. The reversal of 920840873 is 378048029.

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 920840873 - 2²⁰ = 919792297 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 920840873.

It is not an unprimeable number, because it can be changed into a prime (920840273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9796133 + ... + 9796226.

It is an arithmetic number, because the mean of its divisors is an integer number (235108320).

Almost surely, 2^920840873 is an apocalyptic number.

It is an amenable number.

920840873 is a deficient number, since it is larger than the sum of its proper divisors (19592407).

920840873 is a wasteful number, since it uses less digits than its factorization.

920840873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19592406.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 920840873 is about 30345.3599912738. The cubic root of 920840873 is about 972.8850489178.

The spelling of 920840873 in words is "nine hundred twenty million, eight hundred forty thousand, eight hundred seventy-three".