349493839 has 2 divisors, whose sum is σ = 349493840. Its totient is φ = 349493838.

The previous prime is 349493831. The next prime is 349493849. The reversal of 349493839 is 938394943.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 349493839 - 2³ = 349493831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349493831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174746919 + 174746920.

It is an arithmetic number, because the mean of its divisors is an integer number (174746920).

Almost surely, 2^349493839 is an apocalyptic number.

349493839 is a deficient number, since it is larger than the sum of its proper divisors (1).

349493839 is an equidigital number, since it uses as much as digits as its factorization.

349493839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 52.

The square root of 349493839 is about 18694.7543177224. The cubic root of 349493839 is about 704.3899885693.

The spelling of 349493839 in words is "three hundred forty-nine million, four hundred ninety-three thousand, eight hundred thirty-nine".