840769471 has 4 divisors (see below), whose sum is σ = 841532832. Its totient is φ = 840006112.

The previous prime is 840769469. The next prime is 840769477. The reversal of 840769471 is 174967048.

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

It is a cyclic number.

It is not a de Polignac number, because 840769471 - 2¹ = 840769469 is a prime.

It is a super-3 number, since 3×840769471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840769477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380026 + ... + 382231.

It is an arithmetic number, because the mean of its divisors is an integer number (210383208).

Almost surely, 2^840769471 is an apocalyptic number.

840769471 is a deficient number, since it is larger than the sum of its proper divisors (763361).

840769471 is a wasteful number, since it uses less digits than its factorization.

840769471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763360.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 840769471 is about 28996.0250896567. The cubic root of 840769471 is about 943.8268135891.

The spelling of 840769471 in words is "eight hundred forty million, seven hundred sixty-nine thousand, four hundred seventy-one".