349850639 has 4 divisors (see below), whose sum is σ = 349891080. Its totient is φ = 349810200.

The previous prime is 349850621. The next prime is 349850647. The reversal of 349850639 is 936058943.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 349850639 - 2²⁸ = 81415183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 349850593 and 349850602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349840639) 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, 1412 + ... + 26489.

It is an arithmetic number, because the mean of its divisors is an integer number (87472770).

Almost surely, 2^349850639 is an apocalyptic number.

349850639 is a deficient number, since it is larger than the sum of its proper divisors (40441).

349850639 is a wasteful number, since it uses less digits than its factorization.

349850639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40440.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 349850639 is about 18704.2946672683. The cubic root of 349850639 is about 704.6296121254.

The spelling of 349850639 in words is "three hundred forty-nine million, eight hundred fifty thousand, six hundred thirty-nine".