840300477409 has 4 divisors (see below), whose sum is σ = 840967913520. Its totient is φ = 839633041300.

The previous prime is 840300477383. The next prime is 840300477413. The reversal of 840300477409 is 904774003048.

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 840300477409 - 2⁵ = 840300477377 is a prime.

It is a super-2 number, since 2×840300477409² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840300472409) 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, 333716167 + ... + 333718684.

It is an arithmetic number, because the mean of its divisors is an integer number (210241978380).

Almost surely, 2^840300477409 is an apocalyptic number.

It is an amenable number.

840300477409 is a deficient number, since it is larger than the sum of its proper divisors (667436111).

840300477409 is a wasteful number, since it uses less digits than its factorization.

840300477409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667436110.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 840300477409 in words is "eight hundred forty billion, three hundred million, four hundred seventy-seven thousand, four hundred nine".