840198963 has 4 divisors (see below), whose sum is σ = 1120265288. Its totient is φ = 560132640.

The previous prime is 840198949. The next prime is 840198979. The reversal of 840198963 is 369891048.

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

It is not a de Polignac number, because 840198963 - 2⁶ = 840198899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840196963) 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, 140033158 + ... + 140033163.

It is an arithmetic number, because the mean of its divisors is an integer number (280066322).

Almost surely, 2^840198963 is an apocalyptic number.

840198963 is a deficient number, since it is larger than the sum of its proper divisors (280066325).

840198963 is a wasteful number, since it uses less digits than its factorization.

840198963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280066324.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 840198963 is about 28986.1857269976. The cubic root of 840198963 is about 943.6132859401.

The spelling of 840198963 in words is "eight hundred forty million, one hundred ninety-eight thousand, nine hundred sixty-three".