840551053 has 4 divisors (see below), whose sum is σ = 841119328. Its totient is φ = 839982780.

The previous prime is 840551011. The next prime is 840551093. The reversal of 840551053 is 350155048.

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 840551053 - 2¹³ = 840542861 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 (840551093) 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, 281913 + ... + 284878.

It is an arithmetic number, because the mean of its divisors is an integer number (210279832).

Almost surely, 2^840551053 is an apocalyptic number.

It is an amenable number.

840551053 is a deficient number, since it is larger than the sum of its proper divisors (568275).

840551053 is a wasteful number, since it uses less digits than its factorization.

840551053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568274.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 840551053 is about 28992.2585011930. The cubic root of 840551053 is about 943.7450763131.

The spelling of 840551053 in words is "eight hundred forty million, five hundred fifty-one thousand, fifty-three".