840928453 has 4 divisors (see below), whose sum is σ = 841826860. Its totient is φ = 840030048.

The previous prime is 840928433. The next prime is 840928469. The reversal of 840928453 is 354829048.

840928453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 219573124 + 621355329 = 14818^2 + 24927^2 .

It is a cyclic number.

It is not a de Polignac number, because 840928453 - 2¹³ = 840920261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840928423) 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, 447798 + ... + 449671.

It is an arithmetic number, because the mean of its divisors is an integer number (210456715).

Almost surely, 2^840928453 is an apocalyptic number.

It is an amenable number.

840928453 is a deficient number, since it is larger than the sum of its proper divisors (898407).

840928453 is an equidigital number, since it uses as much as digits as its factorization.

840928453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898406.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 840928453 is about 28998.7664047973. The cubic root of 840928453 is about 943.8862995809.

The spelling of 840928453 in words is "eight hundred forty million, nine hundred twenty-eight thousand, four hundred fifty-three".