840450263 has 4 divisors (see below), whose sum is σ = 841722408. Its totient is φ = 839178120.

The previous prime is 840450251. The next prime is 840450271. The reversal of 840450263 is 362054048.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840450263 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 (840450223) 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, 635081 + ... + 636402.

It is an arithmetic number, because the mean of its divisors is an integer number (210430602).

Almost surely, 2^840450263 is an apocalyptic number.

840450263 is a deficient number, since it is larger than the sum of its proper divisors (1272145).

840450263 is a wasteful number, since it uses less digits than its factorization.

840450263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272144.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 840450263 is about 28990.5202264464. The cubic root of 840450263 is about 943.7073534930.

The spelling of 840450263 in words is "eight hundred forty million, four hundred fifty thousand, two hundred sixty-three".