349390859 has 4 divisors (see below), whose sum is σ = 355118640. Its totient is φ = 343663080.

The previous prime is 349390841. The next prime is 349390871. The reversal of 349390859 is 958093943.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 349390859 - 2⁸ = 349390603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349390819) 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, 2863799 + ... + 2863920.

It is an arithmetic number, because the mean of its divisors is an integer number (88779660).

Almost surely, 2^349390859 is an apocalyptic number.

349390859 is a deficient number, since it is larger than the sum of its proper divisors (5727781).

349390859 is an equidigital number, since it uses as much as digits as its factorization.

349390859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5727780.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 349390859 is about 18691.9998662529. Note that the first 3 decimals coincide. The cubic root of 349390859 is about 704.3207978344.

The spelling of 349390859 in words is "three hundred forty-nine million, three hundred ninety thousand, eight hundred fifty-nine".