840054641 has 4 divisors (see below), whose sum is σ = 857928192. Its totient is φ = 822181092.

The previous prime is 840054613. The next prime is 840054667. The reversal of 840054641 is 146450048.

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 840054641 - 2⁶ = 840054577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840054598 and 840054607.

It is not an unprimeable number, because it can be changed into a prime (840054601) 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, 8936705 + ... + 8936798.

It is an arithmetic number, because the mean of its divisors is an integer number (214482048).

Almost surely, 2^840054641 is an apocalyptic number.

It is an amenable number.

840054641 is a deficient number, since it is larger than the sum of its proper divisors (17873551).

840054641 is a wasteful number, since it uses less digits than its factorization.

840054641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17873550.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 840054641 is about 28983.6961238556. The cubic root of 840054641 is about 943.5592543115.

The spelling of 840054641 in words is "eight hundred forty million, fifty-four thousand, six hundred forty-one".