840090343 has 6 divisors (see below), whose sum is σ = 892414616. Its totient is φ = 790672992.

The previous prime is 840090331. The next prime is 840090347. The reversal of 840090343 is 343090048.

It is not a de Polignac number, because 840090343 - 2²⁵ = 806535911 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 (840090347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1453155 + ... + 1453732.

Almost surely, 2^840090343 is an apocalyptic number.

840090343 is a deficient number, since it is larger than the sum of its proper divisors (52324273).

840090343 is a wasteful number, since it uses less digits than its factorization.

840090343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906921 (or 2906904 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 840090343 is about 28984.3120152954. The cubic root of 840090343 is about 943.5726210910.

The spelling of 840090343 in words is "eight hundred forty million, ninety thousand, three hundred forty-three".