840595491 has 6 divisors (see below), whose sum is σ = 1214193500. Its totient is φ = 560396988.

The previous prime is 840595451. The next prime is 840595499. The reversal of 840595491 is 194595048.

It is not a de Polignac number, because 840595491 - 2¹⁰ = 840594467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840595499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46699741 + ... + 46699758.

Almost surely, 2^840595491 is an apocalyptic number.

840595491 is a deficient number, since it is larger than the sum of its proper divisors (373598009).

840595491 is a wasteful number, since it uses less digits than its factorization.

840595491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93399505 (or 93399502 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 840595491 is about 28993.0248680609. The cubic root of 840595491 is about 943.7617072302.

The spelling of 840595491 in words is "eight hundred forty million, five hundred ninety-five thousand, four hundred ninety-one".