842642193 has 4 divisors (see below), whose sum is σ = 1123522928. Its totient is φ = 561761460.

The previous prime is 842642167. The next prime is 842642197. The reversal of 842642193 is 391246248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 842642193 - 2⁵ = 842642161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (842642197) 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, 140440363 + ... + 140440368.

It is an arithmetic number, because the mean of its divisors is an integer number (280880732).

Almost surely, 2^842642193 is an apocalyptic number.

It is an amenable number.

842642193 is a deficient number, since it is larger than the sum of its proper divisors (280880735).

842642193 is a wasteful number, since it uses less digits than its factorization.

842642193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280880734.

The product of its digits is 82944, while the sum is 39.

The square root of 842642193 is about 29028.2998640981. The cubic root of 842642193 is about 944.5270509301.

The spelling of 842642193 in words is "eight hundred forty-two million, six hundred forty-two thousand, one hundred ninety-three".