349139643 has 8 divisors (see below), whose sum is σ = 468376128. Its totient is φ = 231331464.

The previous prime is 349139617. The next prime is 349139653. The reversal of 349139643 is 346931943.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 349139643 - 2⁶ = 349139579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 349139595 and 349139604.

It is not an unprimeable number, because it can be changed into a prime (349139653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356505 + ... + 357482.

It is an arithmetic number, because the mean of its divisors is an integer number (58547016).

Almost surely, 2^349139643 is an apocalyptic number.

349139643 is a deficient number, since it is larger than the sum of its proper divisors (119236485).

349139643 is a wasteful number, since it uses less digits than its factorization.

349139643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714153.

The product of its digits is 209952, while the sum is 42.

The square root of 349139643 is about 18685.2787776902. The cubic root of 349139643 is about 704.1519524735.

It can be divided in two parts, 3491 and 39643, that added together give a palindrome (43134).

The spelling of 349139643 in words is "three hundred forty-nine million, one hundred thirty-nine thousand, six hundred forty-three".