349188839 has 4 divisors (see below), whose sum is σ = 349270824. Its totient is φ = 349106856.

The previous prime is 349188793. The next prime is 349188883. The reversal of 349188839 is 938881943.

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-349188839 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 (349188899) 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, 34232 + ... + 43245.

It is an arithmetic number, because the mean of its divisors is an integer number (87317706).

Almost surely, 2^349188839 is an apocalyptic number.

349188839 is a deficient number, since it is larger than the sum of its proper divisors (81985).

349188839 is an equidigital number, since it uses as much as digits as its factorization.

349188839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81984.

The product of its digits is 1492992, while the sum is 53.

The square root of 349188839 is about 18686.5951687299. The cubic root of 349188839 is about 704.1850240856.

The spelling of 349188839 in words is "three hundred forty-nine million, one hundred eighty-eight thousand, eight hundred thirty-nine".