840339193 has 4 divisors (see below), whose sum is σ = 846754128. Its totient is φ = 833924260.

The previous prime is 840339161. The next prime is 840339197. The reversal of 840339193 is 391933048.

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 a cyclic number.

It is not a de Polignac number, because 840339193 - 2⁵ = 840339161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840339197) 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, 3207271 + ... + 3207532.

It is an arithmetic number, because the mean of its divisors is an integer number (211688532).

Almost surely, 2^840339193 is an apocalyptic number.

It is an amenable number.

840339193 is a deficient number, since it is larger than the sum of its proper divisors (6414935).

840339193 is a wasteful number, since it uses less digits than its factorization.

840339193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414934.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 840339193 is about 28988.6045369556. The cubic root of 840339193 is about 943.6657796692.

The spelling of 840339193 in words is "eight hundred forty million, three hundred thirty-nine thousand, one hundred ninety-three".